ocda, minor text formatting for comments & debugs

- side-note: issues with doom emacs org babel
  tangle
  (not completely resolved, and have persisted)

3 files changed, 491 insertions, 1133 deletions

diff --git a/flake.lock b/flake.lock
index 2d0b3d2..76090c3 100644
--- a/flake.lock
+++ b/flake.lock
@@ -20,11 +20,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1700108881,
-        "narHash": "sha256-+Lqybl8kj0+nD/IlAWPPG/RDTa47gff9nbei0u7BntE=",
+        "lastModified": 1700385946,
+        "narHash": "sha256-J6hzbr93aJjTMYD9ujvN0htwHSZDE4LxPZXREaFKyLY=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "7414e9ee0b3e9903c24d3379f577a417f0aae5f1",
+        "rev": "53aeb5c67b78a1bb565467043b79c3948afacbc9",
         "type": "github"
       },
       "original": {
diff --git a/org/ocda.org b/org/ocda.org
index b484299..99f7d1a 100644
--- a/org/ocda.org
+++ b/org/ocda.org
@@ -26,14 +26,12 @@ Process markup document, create document abstraction.
 #+HEADER: :noweb yes
 #+BEGIN_SRC d
 <<doc_header_including_copyright_and_license>>
-/++
-  document abstraction:
-  abstraction of sisu markup for downstream processing
-  metadoc_from_src.d
-+/
+// document abstraction:
+// abstraction of sisu markup for downstream processing
+// metadoc_from_src.d
 module doc_reform.meta.metadoc_from_src;
 template docAbstraction() {
-  /+ ↓ abstraction imports +/
+  // ↓ abstraction imports
   <<docInitialize>>
   <<docAbstraction>>
   <<docSortOut>>
@@ -60,11 +58,11 @@ import
   doc_reform.meta.rgx,
   doc_reform.meta.metadoc_object_setter,
   doc_reform.meta.rgx;
-/+ ↓ abstraction mixins +/
+// ↓ abstraction mixins
 mixin ObjectSetter;
 mixin InternalMarkup;
 mixin spineRgxIn;
-/+ ↓ abstraction struct init +/
+// ↓ abstraction struct init
 @safe static auto eN() {
   struct _e {
     enum bi {
@@ -117,7 +115,7 @@ mixin spineRgxIn;
   }
   return _e();
 }
-/+ initialize +/
+// initialize
 ObjGenericComposite[] the_document_toc_section, the_document_head_section, the_document_body_section, the_document_bibliography_section, the_document_glossary_section, the_document_blurb_section, the_document_xml_dom_tail_section;
 struct _theDoc {
   ObjGenericComposite[] toc;
@@ -138,7 +136,7 @@ string[string] tag_in_seg;
 string lev_anchor_tag;
 string[string][string] tag_assoc;
 string[] lv0to3_tags;
-/+ enum +/
+// enum
 enum DocStructMarkupHeading {
   h_sect_A,
   h_sect_B,
@@ -153,26 +151,26 @@ enum DocStructMarkupHeading {
 } // header section A-D; header text 1-4
 enum Status { off, on, }
 enum OCNtype { ocn, non, bkidx, }
-/+ biblio variables +/
+// biblio variables
 string biblio_tag_name, biblio_tag_entry, st;
 string[] biblio_arr_json;
 string biblio_entry_str_json;
 JSONValue[] bib_arr_json;
 int bib_entry;
-/+ counters +/
+// counters
 int cntr, previous_count, previous_length;
 bool reset_note_numbers = true;
 int[string] line_occur;
 int html_segnames_ptr = 0;
 int html_segnames_ptr_cntr = 0;
 int verse_line, heading_ptr;
-/+ paragraph attributes +/
+// paragraph attributes
 int[string] indent;
 bool bullet = true;
 string content_non_header = "8";
 static auto obj_im = ObjInlineMarkup();
 static auto obj_att = ObjAttributes();
-/+ ocn +/
+// ocn
 struct OCNset {
   int digit;
   int object_number;
@@ -302,9 +300,7 @@ enum DomTags { none, open, close, close_and_open, open_still, }
       }
     }
   }
-  debug(dom_magic_numbers) {
-    writeln("marked up: ", lev, ": ", dom);
-  }
+  debug(dom_magic_numbers) { writeln("marked up: ", lev, ": ", dom); }
   obj.metainfo.dom_structure_markedup_tags_status = dom.dup;
   return obj;
 }
@@ -346,9 +342,7 @@ enum DomTags { none, open, close, close_and_open, open_still, }
       }
     }
   }
-  debug(dom_magic_numbers) {
-    writeln("collapsed: ", lev, ": ", dom);
-  }
+  debug(dom_magic_numbers) { writeln("collapsed: ", lev, ": ", dom); }
   obj.metainfo.dom_structure_collapsed_tags_status = dom.dup;
   return obj;
 }
@@ -406,10 +400,10 @@ enum DomTags { none, open, close, close_and_open, open_still, }
   }
   return obj_txt;
 }
-/+ book index variables +/
+// book index variables
 string book_idx_tmp;
 string[][string][string] bookindex_unordered_hashes;
-/+ node +/
+// node
 ObjGenericComposite comp_obj_heading, comp_obj_location, comp_obj_block, comp_obj_code, comp_obj_poem_ocn, comp_obj_comment;
 auto node_construct = NodeStructureMetadata();
 enum sObj { content, anchor_tag, notes_reg, notes_star, links, image_no_dimensions }
@@ -526,7 +520,7 @@ struct retStruct_flow_table_substantive_munge {
   bool               _new_doc
 ) {
   static auto rgx = RgxI();
-  /+ ↓ abstraction init +/
+  // ↓ abstraction init
   scope(success) {
   }
   scope(failure) {
@@ -667,7 +661,7 @@ struct retStruct_flow_table_substantive_munge {
   string[][string] lev4_subtoc;
   string[][string] segnames = ["html": ["toc"], "epub": ["toc"]];
   int cnt1 = 1; int cnt2 = 1; int cnt3 = 1;
-  /+ abstraction init ↑ +/
+  // abstraction init ↑
   enum Substitute { match, markup, }
   debug (substitutions) {
     writeln(__LINE__, ":", __FILE__, ": DEBUG substitutions:");
@@ -709,9 +703,9 @@ struct retStruct_flow_table_substantive_munge {
     _loopMarkupSrcByLineStruct ret;
     srcDocLoopLineByLine_:
     foreach (line; markup_sourcefile_content) {
-      /+ ↓ markup document/text line by line +/
+      // ↓ markup document/text line by line
       // "line" variable can be empty but should never be null
-      /+ scope +/
+      // scope
       scope(exit) { }
       scope(failure) {
         stderr.writefln(
@@ -721,17 +715,13 @@ struct retStruct_flow_table_substantive_munge {
           manifested.src.filename, line,
         );
       }
-      debug(source) {
-        writeln(line);
-      }
-      debug(srclines) {
-        if (!line.empty) { writefln("* %s", line); }
-      }
+      debug(source) { writeln(line); }
+      debug(srclines) { if (!line.empty) { writefln("* %s", line); } }
       if (!line.empty) { pith = line._check_ocn_status_(pith); }
       if ( pith["block_is"] == eN.blk_is.code
         && pith["block_state"] == eN.blk_state.on
       ) {
-        /+ block object: code +/
+        // block object: code
         {
           auto _get = line.txt_by_line_block_code(an_object, pith);
           an_object = _get.this_object;
@@ -739,9 +729,9 @@ struct retStruct_flow_table_substantive_munge {
         }
         continue;
       } else if (!matchFirst(line, rgx.skip_from_regular_parse)) {
-        /+ object other than "code block" object +/
-        /+ (includes regular text paragraph, headings & blocks other than code) +/
-        /+ heading, glossary, blurb, poem, group, block, quote, table +/
+        // object other than "code block" object
+        // (includes regular text paragraph, headings & blocks other than code)
+        // heading, glossary, blurb, poem, group, block, quote, table
         line = line.inline_markup_faces; // by text line (rather than by text object), linebreaks in para problematic
         if (line.matchFirst(rgx.heading_biblio)
         || (pith["section"] == eN.sect.bibliography
@@ -774,11 +764,8 @@ struct retStruct_flow_table_substantive_munge {
           && (!(line.matchFirst(rgx.heading)))
           && (!(line.matchFirst(rgx.comment)))))
         ) {
-          /+ within section (block object): glossary +/
-          debug(glossary) {
-            writeln(__LINE__);
-            writeln(line);
-          }
+          // within section (block object): glossary
+          debug(glossary) { writeln(__LINE__); writeln(line); }
           pith["section"] = eN.sect.glossary;
           if (opt_action.backmatter && opt_action.section_glossary) {
             indent = [
@@ -880,10 +867,7 @@ struct retStruct_flow_table_substantive_munge {
           && (!(line.matchFirst(rgx.comment)))))
         ) {
           pith["section"] = eN.sect.blurb;
-          debug(blurb) {
-            writeln(__LINE__);
-            writeln(line);
-          }
+          debug(blurb) { writeln(__LINE__); writeln(line); }
           if (opt_action.backmatter && opt_action.section_blurb) {
             indent = [
               "hang_position" : 0,
@@ -891,28 +875,20 @@ struct retStruct_flow_table_substantive_munge {
             ];
             bullet = false;
             if (auto m = line.matchFirst(rgx.para_indent)) {
-              debug(paraindent) {
-                writeln(line);
-              }
+              debug(paraindent) { writeln(line); }
               indent["hang_position"] = (m["indent"]).to!int;
               indent["base_position"] = (m["indent"]).to!int;
             } else if (line.matchFirst(rgx.para_bullet)) {
-              debug(parabullet) {
-                writeln(line);
-              }
+              debug(parabullet) { writeln(line); }
               bullet = true;
             } else if (auto m = line.matchFirst(rgx.para_indent_hang)) {
-              debug(paraindenthang) {
-                writeln(line);
-              }
+              debug(paraindenthang) { writeln(line); }
               indent = [
                 "hang_position" : (m["hang"]).to!int,
                 "base_position" : (m["indent"]).to!int,
               ];
             } else if (auto m = line.matchFirst(rgx.para_bullet_indent)) {
-              debug(parabulletindent) {
-                writeln(line);
-              }
+              debug(parabulletindent) { writeln(line); }
               indent = [
                 "hang_position" : (m["indent"]).to!int,
                 "base_position" : (m["indent"]).to!int,
@@ -1093,7 +1069,7 @@ struct retStruct_flow_table_substantive_munge {
             continue;
           }
         } else {
-          /+ not within a block group +/
+          // not within a block group
           assert(
             (pith["block_state"] == eN.blk_state.off)
             || (pith["block_state"] == eN.blk_state.closing),
@@ -1101,7 +1077,7 @@ struct retStruct_flow_table_substantive_munge {
           );
           if (line.matchFirst(rgx.block_open)) {
             if (line.matchFirst(rgx.block_poem_open)) {
-              /+ poem to verse exceptions! +/
+              // poem to verse exceptions!
               object_reset(an_object);
               processing.remove("verse");
               object_number_poem["start"] = obj_cite_digits.object_number.to!string;
@@ -1116,7 +1092,7 @@ struct retStruct_flow_table_substantive_munge {
             }
             continue;
           } else if (!line.empty) {
-            /+ line not empty - non blocks (headings, paragraphs) & closed blocks +/
+            // line not empty - non blocks (headings, paragraphs) & closed blocks
             assert(
               !line.empty,
               "line tested, line not empty surely:\n  \"" ~ line ~ "\""
@@ -1127,10 +1103,7 @@ struct retStruct_flow_table_substantive_munge {
               "code block status: none or closed"
             );
             if (pith["block_state"] == eN.blk_state.closing) {
-              debug(check) {
-                writeln(__LINE__);
-                writeln(line);
-              }
+              debug(check) { writeln(__LINE__); writeln(line); }
               assert(
                 line.matchFirst(rgx.book_index_item)
                 || line.matchFirst(rgx.book_index_item_open)
@@ -1142,7 +1115,7 @@ struct retStruct_flow_table_substantive_munge {
             if (line.matchFirst(rgx.book_index_item)
             || line.matchFirst(rgx.book_index_item_open)
             || pith["section"] == eN.sect.book_index)  {
-              /+ book_index +/
+              // book_index
               {
                 auto _get = line.flow_book_index_(an_object, book_idx_tmp, pith, opt_action);
                 {
@@ -1152,13 +1125,11 @@ struct retStruct_flow_table_substantive_munge {
                 }
               }
             } else {
-              /+ not book_index +/
+              // not book_index
               an_object_key = "body_nugget";
               if (auto m = line.matchFirst(rgx.comment)) {
-                /+ matched comment +/
-                debug(comment) {
-                  writeln(line);
-                }
+                // matched comment
+                debug(comment) { writeln(line); }
                 an_object[an_object_key]                ~= line ~= "\n";
                 comp_obj_comment                        = comp_obj_comment.init;
                 comp_obj_comment.metainfo.is_of_part    = "comment"; // breaks flow
@@ -1180,10 +1151,10 @@ struct retStruct_flow_table_substantive_munge {
               } else if ((line_occur["para"] == eN.bi.off
                 && line_occur["heading"] == eN.bi.off)
                 && pith["txt_is"] == eN.txt_is.off
-              ) {                             /+ heading or para but neither flag nor line exists +/
+              ) { // heading or para but neither flag nor line exists
                 if ((conf_make_meta.make.headings.length > 2)
                 && (pith["make_headings"] == eN.bi.off)) {
-                  /+ heading found +/
+                  // heading found
                   {
                     auto _get = line.flow_heading_found_(heading_match_str, conf_make_meta.make.headings, heading_match_rgx, pith);
                     {
@@ -1198,7 +1169,7 @@ struct retStruct_flow_table_substantive_munge {
                   && line_occur["heading"] == eN.bi.off)
                   && pith["txt_is"] == eN.txt_is.off
                 ) {
-                  /+ heading make set +/
+                  // heading make set
                   {
                     auto _get = line.flow_heading_make_set_(line_occur, heading_match_rgx, pith);
                     {
@@ -1208,14 +1179,13 @@ struct retStruct_flow_table_substantive_munge {
                     }
                   }
                 }
-                /+ TODO node info: all headings identified at this point,
-                   - extract node info here??
-                   - how long can it wait?
-                   - should be incorporated in composite objects
-                   - should happen before endnote links set (they need to be moved down?)
-                +/
+                // TODO node info: all headings identified at this point,
+                // - extract node info here??
+                // - how long can it wait?
+                // - should be incorporated in composite objects
+                // - should happen before endnote links set (they need to be moved down?)
                 if (line.matchFirst(rgx.headings)) {
-                  /+ heading match +/
+                  // heading match
                   line = line._doc_header_and_make_substitutions_(conf_make_meta);
                   {
                     auto _get = line.flow_heading_matched_(
@@ -1233,7 +1203,7 @@ struct retStruct_flow_table_substantive_munge {
                     }
                   }
                 } else if (line_occur["para"] == eN.bi.off) {
-                  /+ para match +/
+                  // para match
                   an_object_key = "body_nugget";
                   line = line
                     ._doc_header_and_make_substitutions_(conf_make_meta)
@@ -1251,17 +1221,13 @@ struct retStruct_flow_table_substantive_munge {
                   }
                 }
               } else if (line_occur["heading"] > eN.bi.off) {
-                /+ heading +/
-                debug(heading) {
-                  writeln(line);
-                }
+                // heading
+                debug(heading) { writeln(line); }
                 an_object[an_object_key] ~= line ~= "\n";
                 ++line_occur["heading"];
               } else if (line_occur["para"] > eN.bi.off) {
-                /+ paragraph +/
-                debug(para) {
-                  writeln(an_object_key, "-> ", line);
-                }
+                // paragraph
+                debug(para) { writeln(an_object_key, "-> ", line); }
                 line = line
                   ._doc_header_and_make_substitutions_(conf_make_meta)
                   ._doc_header_and_make_substitutions_fontface_(conf_make_meta);
@@ -1270,7 +1236,7 @@ struct retStruct_flow_table_substantive_munge {
               }
             }
           } else if (pith["block_state"] == eN.blk_state.closing) {
-            /+ line empty, with blocks flag +/
+            // line empty, with blocks flag
             {
               auto _get = line.flow_block_flag_line_empty_(
                 an_object,
@@ -1296,7 +1262,7 @@ struct retStruct_flow_table_substantive_munge {
               }
             }
           } else {
-            /+ line.empty, post contents, empty variables: +/
+            // line.empty, post contents, empty variables:
             assert(
               line.empty,
               "\nline should be empty:\n  \""
@@ -1314,7 +1280,7 @@ struct retStruct_flow_table_substantive_munge {
             if (pith["txt_is"] == eN.txt_is.heading
               && line_occur["heading"] > eN.bi.off
             ) {
-              /+ heading object (current line empty) +/
+              // heading object (current line empty)
               obj_cite_digits = (an_object["lev_markup_number"].to!int == 0)
               ? ocn_emit(eN.ocn.reset)
               : ocn_emit(pith["ocn"]);
@@ -1341,7 +1307,7 @@ struct retStruct_flow_table_substantive_munge {
                 tag_assoc[anchor_tag]["seg_lv4"]    = tag_in_seg["seg_lv4"];
                 tag_assoc[anchor_tag]["seg_lv1to4"] = tag_in_seg["seg_lv1to4"];
                 if (lv0to3_tags.length > 0) {
-                  /+ names used for html markup segments 1 to 4 (rather than epub which has separate segments for A to D) +/
+                  // names used for html markup segments 1 to 4 (rather than epub which has separate segments for A to D)
                   foreach (lv0_to_lv3_html_tag; lv0to3_tags) {
                     tag_assoc[lv0_to_lv3_html_tag]["seg_lv4"] = anchor_tag;
                   }
@@ -1357,7 +1323,7 @@ struct retStruct_flow_table_substantive_munge {
               } else if (an_object["lev_markup_number"].to!int < 4) {
                 string segn;
                 switch (an_object["lev_markup_number"].to!int) {
-                /+ names used for epub markup segments A to D +/
+                // names used for epub markup segments A to D
                 case 0:
                   segn = "_the_title";
                   goto default;
@@ -1385,8 +1351,8 @@ struct retStruct_flow_table_substantive_munge {
                 = ("bookindex_nugget" in an_object) ? an_object["bookindex_nugget"] : "";
               bookindex_unordered_hashes
                 = bookindex_extract_hash.bookindex_nugget_hash(an_object["bookindex_nugget"], obj_cite_digits, tag_in_seg);
-              /+ (incrementally build toc) table of contents here! +/
               _anchor_tag                   = obj_cite_digits.identifier;
+              // (incrementally build toc) table of contents here!
               {
                 auto _get = obj_im.flow_table_of_contents_gather_headings(
                   an_object,
@@ -1434,9 +1400,7 @@ struct retStruct_flow_table_substantive_munge {
                 writeln(tag_in_seg["seg_lv1to4"]);
               }
               the_document_body_section ~= comp_obj_heading;
-              debug(objectrelated1) { // check
-                writeln(line);
-              }
+              debug(objectrelated1) { writeln(line); } // check
               {
                 auto _get = txt_by_line_common_reset_(line_occur, an_object, pith);
                 {
@@ -1451,7 +1415,7 @@ struct retStruct_flow_table_substantive_munge {
               ++cntr;
             } else if (pith["txt_is"] == eN.txt_is.para
               && line_occur["para"] > eN.bi.off
-            ) { /+ paragraph object (current line empty) - repeated character paragraph separator +/
+            ) { // paragraph object (current line empty) - repeated character paragraph separator
               if ((an_object[an_object_key].to!string).matchFirst(rgx.repeated_character_line_separator)) {
                 pith["ocn"] = eN.ocn.off;
               }
@@ -1516,7 +1480,7 @@ struct retStruct_flow_table_substantive_munge {
           } // close else for line empty
         } // close else for not the above
       } // close after non code, other blocks or regular text
-      /+ unless (the_document_body_section.length == 0) ? +/
+      // unless (the_document_body_section.length == 0) ?
       if (the_document_body_section.length > 0) {
         if (((the_document_body_section[$-1].metainfo.is_a == "para")
           || (the_document_body_section[$-1].metainfo.is_a == "heading")
@@ -1530,7 +1494,7 @@ struct retStruct_flow_table_substantive_munge {
             pith["section"] = eN.sect.unset;
           }
           if (the_document_body_section[$-1].metainfo.is_a == "verse") {
-            /+ scan for endnotes for whole poem (each verse in poem) +/
+            // scan for endnotes for whole poem (each verse in poem)
             foreach (i; previous_length .. the_document_body_section.length) {
               if (the_document_body_section[i].metainfo.is_a == "verse") {
                 if ((the_document_body_section[i].text).match(
@@ -1545,7 +1509,7 @@ struct retStruct_flow_table_substantive_munge {
               }
             }
           } else {
-            /+ scan object for endnotes +/
+            // scan object for endnotes
             previous_length = the_document_body_section.length.to!int;
             if ((the_document_body_section[$-1].text).match(
               rgx.inline_notes_al_all_note
@@ -1610,13 +1574,8 @@ struct retStruct_flow_table_substantive_munge {
   auto the_document_endnotes_section = en_tuple[0];
   obj_cite_digits = en_tuple[1];
   debug(endnotes) {
-    writefln("%s %s",
-      __LINE__,
-      the_document_endnotes_section.length
-    );
-    foreach (o; the_document_endnotes_section) {
-      writeln(o);
-    }
+    writefln("%s %s", __LINE__, the_document_endnotes_section.length);
+    foreach (o; the_document_endnotes_section) { writeln(o); }
   }
   if (an_object["glossary_nugget"].length == 0) {
     comp_obj_heading_                                   = comp_obj_heading_.init;
@@ -1636,11 +1595,7 @@ struct retStruct_flow_table_substantive_munge {
     comp_obj_heading_.metainfo.parent_lev_markup        = 0;
     the_document_glossary_section                       ~= comp_obj_heading_;
   }
-  debug(glossary) {
-    foreach (gloss; the_document_glossary_section) {
-      writeln(gloss.text);
-    }
-  }
+  debug(glossary) { foreach (gloss; the_document_glossary_section) { writeln(gloss.text); } }
   auto biblio_unsorted_incomplete = biblio_arr_json.dup;
   auto biblio = Bibliography();
   JSONValue[] biblio_ordered;
@@ -1756,11 +1711,7 @@ struct retStruct_flow_table_substantive_munge {
     comp_obj_heading_.metainfo.parent_lev_markup        = 0;
     the_document_bibliography_section                   ~= comp_obj_heading_;
   }
-  debug(bibliosection) {
-    foreach (o; the_document_bibliography_section) {
-      writeln(o.text);
-    }
-  }
+  debug(bibliosection) { foreach (o; the_document_bibliography_section) { writeln(o.text); } }
   auto bi = BookIndexReportSection();
   auto bi_tuple
     = bi.bookindex_build_abstraction_section(
@@ -1771,11 +1722,7 @@ struct retStruct_flow_table_substantive_munge {
   destroy(bookindex_unordered_hashes);
   auto the_document_bookindex_section = bi_tuple[0];
   obj_cite_digits = bi_tuple[1];
-  debug(bookindex) {
-    foreach (bi_entry; the_document_bookindex_section) {
-      writeln(bi_entry);
-    }
-  }
+  debug(bookindex) { foreach (bi_entry; the_document_bookindex_section) { writeln(bi_entry); } }
   if (an_object["blurb_nugget"].length == 0) {
     comp_obj_heading_                                   = comp_obj_heading_.init;
     comp_obj_heading_.metainfo.is_of_part               = "empty";
@@ -1796,11 +1743,7 @@ struct retStruct_flow_table_substantive_munge {
     comp_obj_heading_.metainfo.parent_lev_markup        = 0;
     the_document_blurb_section                          ~= comp_obj_heading_;
   }
-  debug(blurb) {
-    foreach (blurb; the_document_blurb_section) {
-      writeln(blurb.text);
-    }
-  }
+  debug(blurb) { foreach (blurb; the_document_blurb_section) { writeln(blurb.text); } }
   indent = [
     "hang_position" : 1,
     "base_position" : 1,
@@ -1888,10 +1831,7 @@ struct retStruct_flow_table_substantive_munge {
     the_document_toc_section                            ~= comp_obj_toc;
   }
   debug(toc) {
-    writefln(
-      "%s %s",
-      __LINE__,
-    );
+    writefln( "%s %s", __LINE__,);
     foreach (toc_linked_heading; the_document_toc_section) {
       writeln(mkup.indent_by_spaces_provided(toc_linked_heading.attrib.indent_hang), toc_linked_heading.text);
     }
@@ -1900,9 +1840,7 @@ struct retStruct_flow_table_substantive_munge {
   the_document_body_section = the_document_body_section[1..$];
   @safe int[] _get_ancestors_markup(O)(O obj, ref int[] _ancestors_markup) {
     if (obj.metainfo.is_a == "heading") {
-      debug(dom) {
-        writeln(obj.text);
-      }
+      debug(dom) { writeln(obj.text); }
       if (obj.metainfo.heading_lev_markup == 1) {
         _ancestors_markup = [
           _ancestors_markup[0],
@@ -1980,9 +1918,7 @@ struct retStruct_flow_table_substantive_munge {
       }
       _ancestors_markup[obj.metainfo.heading_lev_markup] = obj.metainfo.ocn;
     }
-    debug(ancestor_markup) {
-      writeln("marked up: ", _ancestors_markup);
-    }
+    debug(ancestor_markup) { writeln("marked up: ", _ancestors_markup); }
     return _ancestors_markup;
   }
   @safe int[] _get_ancestors_collapsed(O)(O obj, ref int[] _ancestors_collapsed) {
@@ -2064,12 +2000,10 @@ struct retStruct_flow_table_substantive_munge {
       }
       _ancestors_collapsed[obj.metainfo.heading_lev_collapsed] = obj.metainfo.ocn;
     }
-    debug(ancestor_collapsed) {
-      writeln("collapsed: ", _ancestors_collapsed);
-    }
+    debug(ancestor_collapsed) { writeln("collapsed: ", _ancestors_collapsed); }
     return _ancestors_collapsed;
   }
-  /+ multiple 1~ levels, loop through document body +/
+  // multiple 1~ levels, loop through document body
   if (the_document_body_section.length > 1) {
     int[] _ancestors_markup = [0,0,0,0,0,0,0,0];
     int[][] _ancestors_markup_;
@@ -2231,14 +2165,12 @@ struct retStruct_flow_table_substantive_munge {
       int max_width = 640;
       foreach (img; obj.text.matchAll(rgx.inline_image_without_dimensions)) {
         try {
-          read_image_info(manifested.src.image_dir_path ~ "/" ~ img["img"], w, h, chans); //
+          read_image_info(manifested.src.image_dir_path ~ "/" ~ img["img"], w, h, chans);
         } catch (Exception ex) {
           writeln("WARNING, image not found: ", img["img"], "\n  ", manifested.src.image_dir_path ~ "/" ~ img["img"]);
         }
         // calculate, decide max width and proportionally reduce to keep w & h within it
-        debug(images) {
-          writeln("width: ", w, ", height: ", h);
-        }
+        debug(images) { writeln("width: ", w, ", height: ", h); }
         if (w > max_width) {
           _w = max_width;
           _h = round((max_width / w.to!real) * h.to!real);
@@ -2257,9 +2189,7 @@ struct retStruct_flow_table_substantive_munge {
           )
         );
       }
-      debug(images) {
-        writeln("image without dimensions: ", obj.text);
-      }
+      debug(images) { writeln("image without dimensions: ", obj.text); }
     }
     return obj;
   }
@@ -2284,22 +2214,19 @@ struct retStruct_flow_table_substantive_munge {
   }
   foreach (ref obj; the_document_head_section) {
     if (obj.metainfo.is_a == "heading") {
-      debug(dom) {
-        writeln(obj.text);
-      }
+      debug(dom) { writeln(obj.text); }
       if (obj.metainfo.heading_lev_markup <= 4) {
         segnames_0_to_4 ~= obj.tags.segment_anchor_tag_epub;
       }
       if (obj.metainfo.heading_lev_markup == 0) {
-        /+ TODO second hit (of two) with same assertion failure, check, fix and reinstate
-        assert( obj.metainfo.ocn == 1,
-          "Title OCN should be 1 not: " ~ obj.metainfo.ocn.to!string); // bug introduced 0.18.1
-        +/
+        // TODO second hit (of two) with same assertion failure, check, fix and reinstate
+        // assert( obj.metainfo.ocn == 1,
+        //   "Title OCN should be 1 not: " ~ obj.metainfo.ocn.to!string); // bug introduced 0.18.1
         obj.metainfo.ocn = 1;
         obj.metainfo.identifier = "1";
         obj.metainfo.object_number_type = OCNtype.ocn;
       }
-      /+ dom structure (marked up & collapsed) +/
+      // dom structure (marked up & collapsed)
       if (opt_action.meta_processing_xml_dom) {
         obj = obj.obj_dom_structure_set_markup_tags(dom_structure_markedup_tags_status, obj.metainfo.heading_lev_markup);
         obj = obj.obj_dom_set_collapsed_tags(dom_structure_collapsed_tags_status, obj.metainfo.heading_lev_collapsed);
@@ -2309,7 +2236,7 @@ struct retStruct_flow_table_substantive_munge {
     obj = _links(obj);
   }
   if (the_document_toc_section.length > 1) {
-    /+ scroll +/
+    // scroll
     dom_structure_markedup_tags_status_buffer = dom_structure_markedup_tags_status.dup;
     dom_structure_collapsed_tags_status_buffer = dom_structure_collapsed_tags_status.dup;
     foreach (ref obj; the_document_toc_section) {
@@ -2322,7 +2249,7 @@ struct retStruct_flow_table_substantive_munge {
               obj.tags.anchor_tag_html ~ "!=" ~ segnames["html"][obj.ptr.html_segnames]);
           }
         }
-        /+ dom structure (marked up & collapsed) +/
+        // dom structure (marked up & collapsed)
         if (opt_action.meta_processing_xml_dom) {
           obj = obj.obj_dom_structure_set_markup_tags(dom_structure_markedup_tags_status, obj.metainfo.heading_lev_markup);
           obj = obj.obj_dom_set_collapsed_tags(dom_structure_collapsed_tags_status, obj.metainfo.heading_lev_collapsed);
@@ -2332,7 +2259,7 @@ struct retStruct_flow_table_substantive_munge {
       obj = _links(obj);
     }
   }
-  /+ multiple 1~ levels, loop through document body +/
+  // multiple 1~ levels, loop through document body
   if (the_document_body_section.length > 1) {
     foreach (ref obj; the_document_body_section) {
       if (!(obj.metainfo.identifier.empty)) {
@@ -2346,9 +2273,7 @@ struct retStruct_flow_table_substantive_munge {
         = obj.tags.epub_segment_anchor_tag_is;
       }
       if (obj.metainfo.is_a == "heading") {
-        debug(dom) {
-          writeln(obj.text);
-        }
+        debug(dom) { writeln(obj.text); }
         if (obj.metainfo.heading_lev_markup <= 4) {
           segnames_0_to_4 ~= obj.tags.segment_anchor_tag_epub;
           if (obj.metainfo.heading_lev_markup == 4) {
@@ -2361,7 +2286,7 @@ struct retStruct_flow_table_substantive_munge {
               obj.tags.anchor_tag_html ~ "!=" ~ segnames["html"][obj.ptr.html_segnames]);
           }
         }
-        /+ dom structure (marked up & collapsed) +/
+        // dom structure (marked up & collapsed)
         if (opt_action.meta_processing_xml_dom) {
           obj = obj.obj_dom_structure_set_markup_tags(dom_structure_markedup_tags_status, obj.metainfo.heading_lev_markup);
           obj = obj.obj_dom_set_collapsed_tags(dom_structure_collapsed_tags_status, obj.metainfo.heading_lev_collapsed);
@@ -2375,7 +2300,7 @@ struct retStruct_flow_table_substantive_munge {
     }
   }
   auto image_list = (_images.sort()).uniq;
-  /+ optional only one 1~ level +/
+  // optional only one 1~ level
   if (the_document_endnotes_section.length > 1) {
     dom_structure_markedup_tags_status_buffer           = dom_structure_markedup_tags_status.dup;
     dom_structure_collapsed_tags_status_buffer          = dom_structure_collapsed_tags_status.dup;
@@ -2383,9 +2308,7 @@ struct retStruct_flow_table_substantive_munge {
     dom_structure_collapsed_tags_status                 = dom_structure_collapsed_tags_status_buffer.dup;
     foreach (ref obj; the_document_endnotes_section) {
       if (obj.metainfo.is_a == "heading") {
-        debug(dom) {
-          writeln(obj.text);
-        }
+        debug(dom) { writeln(obj.text); }
         if (obj.metainfo.heading_lev_markup == 1) {
           obj_cite_digits                               = ocn_emit(eN.ocn.on);
           obj.metainfo.ocn                              = obj_cite_digits.object_number;
@@ -2402,7 +2325,7 @@ struct retStruct_flow_table_substantive_munge {
               obj.tags.anchor_tag_html ~ "!=" ~ segnames["html"][obj.ptr.html_segnames]);
           }
         }
-        /+ dom structure (marked up & collapsed) +/
+        // dom structure (marked up & collapsed)
         if (opt_action.meta_processing_xml_dom) {
           obj = obj.obj_dom_structure_set_markup_tags(dom_structure_markedup_tags_status, obj.metainfo.heading_lev_markup);
           obj = obj.obj_dom_set_collapsed_tags(dom_structure_collapsed_tags_status, obj.metainfo.heading_lev_collapsed);
@@ -2412,13 +2335,11 @@ struct retStruct_flow_table_substantive_munge {
       obj = _links(obj);
     }
   }
-  /+ optional only one 1~ level +/
+  // optional only one 1~ level
   if (the_document_glossary_section.length > 1) {
     foreach (ref obj; the_document_glossary_section) {
       if (obj.metainfo.is_a == "heading") {
-        debug(dom) {
-          writeln(obj.text);
-        }
+        debug(dom) { writeln(obj.text); }
         if (obj.metainfo.heading_lev_markup == 1) {
           obj_cite_digits                               = ocn_emit(eN.ocn.on);
           obj.metainfo.ocn                              = obj_cite_digits.object_number;
@@ -2435,7 +2356,7 @@ struct retStruct_flow_table_substantive_munge {
               obj.tags.anchor_tag_html ~ "!=" ~ segnames["html"][obj.ptr.html_segnames]);
           }
         }
-        /+ dom structure (marked up & collapsed) +/
+        // dom structure (marked up & collapsed)
         if (opt_action.meta_processing_xml_dom) {
           obj = obj.obj_dom_structure_set_markup_tags(dom_structure_markedup_tags_status, obj.metainfo.heading_lev_markup);
           obj = obj.obj_dom_set_collapsed_tags(dom_structure_collapsed_tags_status, obj.metainfo.heading_lev_collapsed);
@@ -2449,13 +2370,11 @@ struct retStruct_flow_table_substantive_munge {
       obj = _links(obj);
     }
   }
-  /+ optional only one 1~ level +/
+  // optional only one 1~ level
   if (the_document_bibliography_section.length > 1) {
     foreach (ref obj; the_document_bibliography_section) {
       if (obj.metainfo.is_a == "heading") {
-        debug(dom) {
-          writeln(obj.text);
-        }
+        debug(dom) { writeln(obj.text); }
         if (obj.metainfo.heading_lev_markup == 1) {
           obj_cite_digits                               = ocn_emit(eN.ocn.on);
           obj.metainfo.ocn                              = obj_cite_digits.object_number;
@@ -2472,7 +2391,7 @@ struct retStruct_flow_table_substantive_munge {
               obj.tags.anchor_tag_html ~ "!=" ~ segnames["html"][obj.ptr.html_segnames]);
           }
         }
-        /+ dom structure (marked up & collapsed) +/
+        // dom structure (marked up & collapsed)
         if (opt_action.meta_processing_xml_dom) {
           obj = obj.obj_dom_structure_set_markup_tags(dom_structure_markedup_tags_status, obj.metainfo.heading_lev_markup);
           obj = obj.obj_dom_set_collapsed_tags(dom_structure_collapsed_tags_status, obj.metainfo.heading_lev_collapsed);
@@ -2486,17 +2405,16 @@ struct retStruct_flow_table_substantive_munge {
       obj = _links(obj);
     }
   }
-  /+ optional only one 1~ level +/
+  // optional only one 1~ level
   int ocn_       = obj_cite_digits.object_number;
   int ocn_bkidx_ = 0;
   int ocn_bidx_;
-  if (the_document_bookindex_section.length > 1) {                                        /+ scroll +/
+  if (the_document_bookindex_section.length > 1) {                                        // scroll
     dom_structure_markedup_tags_status_buffer = dom_structure_markedup_tags_status.dup;
     dom_structure_collapsed_tags_status_buffer = dom_structure_collapsed_tags_status.dup;
     foreach (ref obj; the_document_bookindex_section) {
       if (obj.metainfo.is_a == "heading") {
-        debug(dom) {
-        }
+        // debug(dom) { }
         if (obj.metainfo.heading_lev_markup <= 4) {
           segnames_0_to_4 ~= obj.tags.segment_anchor_tag_epub;
         }
@@ -2515,7 +2433,7 @@ struct retStruct_flow_table_substantive_munge {
               obj.tags.anchor_tag_html ~ "!=" ~ segnames["html"][obj.ptr.html_segnames]);
           }
         }
-        /+ dom structure (marked up & collapsed) +/
+        // dom structure (marked up & collapsed)
         if (opt_action.meta_processing_xml_dom) {
           obj = obj.obj_dom_structure_set_markup_tags(dom_structure_markedup_tags_status, obj.metainfo.heading_lev_markup);
           obj = obj.obj_dom_set_collapsed_tags(dom_structure_collapsed_tags_status, obj.metainfo.heading_lev_collapsed);
@@ -2530,18 +2448,14 @@ struct retStruct_flow_table_substantive_munge {
       }
       obj = _links(obj);
     }
-    /+ TODO assert failure, reinstate
-    assert(obj_cite_digit_bkidx == ocn_bidx_
-      obj_cite_digit_bkidx ~ " == ocn_" ~ ocn_ ~ "?");
-    +/
+    // TODO assert failure, reinstate
+    // assert(obj_cite_digit_bkidx == ocn_bidx_ obj_cite_digit_bkidx ~ " == ocn_" ~ ocn_ ~ "?");
   }
-  /+ optional only one 1~ level +/
+  // optional only one 1~ level
   if (the_document_blurb_section.length > 1) {
     foreach (ref obj; the_document_blurb_section) {
       if (obj.metainfo.is_a == "heading") {
-        debug(dom) {
-          writeln(obj.text);
-        }
+        debug(dom) { writeln(obj.text); }
         if (obj.metainfo.heading_lev_markup == 1) {
           obj_cite_digits                               = ocn_emit(eN.ocn.on);
           obj.metainfo.ocn                              = obj_cite_digits.object_number;
@@ -2558,7 +2472,7 @@ struct retStruct_flow_table_substantive_munge {
               obj.tags.anchor_tag_html ~ "!=" ~ segnames["html"][obj.ptr.html_segnames]);
           }
         }
-        /+ dom structure (marked up & collapsed) +/
+        // dom structure (marked up & collapsed)
         if (opt_action.meta_processing_xml_dom) {
           obj = obj.obj_dom_structure_set_markup_tags(dom_structure_markedup_tags_status, obj.metainfo.heading_lev_markup);
           obj = obj.obj_dom_set_collapsed_tags(dom_structure_collapsed_tags_status, obj.metainfo.heading_lev_collapsed);
@@ -2585,7 +2499,7 @@ struct retStruct_flow_table_substantive_munge {
     );
     debug(decendants_tuple) {
       pairs = pairs.sort();
-      foreach (pair; pairs) {  // (pair; pairs.sort())
+      foreach (pair; pairs) { // (pair; pairs.sort())
         writeln(pair[0], "..", pair[1]);
       }
     }
@@ -2676,12 +2590,11 @@ struct retStruct_flow_table_substantive_munge {
       }
     }
   }
-  /+ TODO
-    - note create/insert heading object sole purpose eof close all open tags
-      sort out:
-      - obj.metainfo.dom_structure_markedup_tags_status = dom_structure_markedup_tags_status;
-      - obj.metainfo.dom_structure_collapsed_tags_status = dom_structure_collapsed_tags_status;
-  +/
+  // TODO
+  //  - note create/insert heading object sole purpose eof close all open tags
+  //    sort out:
+  //    - obj.metainfo.dom_structure_markedup_tags_status = dom_structure_markedup_tags_status;
+  //    - obj.metainfo.dom_structure_collapsed_tags_status = dom_structure_collapsed_tags_status;
   comp_obj_heading_                                               = comp_obj_heading_.init;
   comp_obj_heading_.metainfo.is_of_part                           = "empty";
   comp_obj_heading_.metainfo.is_of_section                        = "empty";
@@ -2710,15 +2623,15 @@ struct retStruct_flow_table_substantive_munge {
   ObjGenericComposite[][string] document_the = [
     "head":             the_document_head_section,
     "toc":              the_document_toc_section,
-    /+ substantive/body: +/
+    // substantive/body:
     "body":             the_document_body_section,
-    /+ backmatter: +/
+    // backmatter:
     "endnotes":         the_document_endnotes_section,
     "glossary":         the_document_glossary_section,
     "bibliography":     the_document_bibliography_section,
     "bookindex":        the_document_bookindex_section,
     "blurb":            the_document_blurb_section,
-    /+ dom tail only +/
+    // dom tail only
     "tail":             the_document_xml_dom_tail_section,
   ];
   string[][string] document_section_keys_sequenced = [
@@ -2853,7 +2766,7 @@ struct retStruct_flow_table_substantive_munge {
     ret.doc_has      = doc_has;
   }
   return ret;
-}                                                                             /+ ← closed: abstract doc source +/
+} // ← closed: abstract doc source
 #+END_SRC
 
 ** sort
@@ -2890,12 +2803,7 @@ struct retStruct_flow_table_substantive_munge {
     an_object["lang"]               = "";
     an_object["attrib"]             = (m["attrib"]) ? m["attrib"].to!string : "";
     an_object["syntax"]             = (m["syntax"]) ? m["syntax"].to!string : "";
-    debug(codecurly) {                              // code (curly) open
-      writefln(
-        "* [code curly] %s",
-        line
-      );
-    }
+    debug(codecurly) { writefln( "* [code curly] %s", line); }                              // code (curly) open
     pith["block_is"]                = eN.blk_is.code;
     pith["block_state"]             = eN.blk_state.on;
     pith["block_delim"]             = eN.blk_delim.curly;
@@ -2904,12 +2812,7 @@ struct retStruct_flow_table_substantive_munge {
     an_object["syntax"]             = "";
     an_object["attrib"]             = (m["attrib"]) ? m["attrib"].to!string : "";
     an_object["lang"]               = (m["lang"]) ? m["lang"].to!string : "";
-    debug(poem) {                              // poem (curly) open
-      writefln(
-        "* [poem curly] %s",
-        line
-      );
-    }
+    debug(poem) { writefln( "* [poem curly] %s", line); }                              // poem (curly) open
     object_number_poem["start"]     = obj_cite_digits.object_number.to!string;
     pith["block_is"]                = eN.blk_is.poem;
     pith["block_state"]             = eN.blk_state.on;
@@ -2920,12 +2823,7 @@ struct retStruct_flow_table_substantive_munge {
     an_object["syntax"]             = "";
     an_object["attrib"]             = (m["attrib"]) ? m["attrib"].to!string : "";
     an_object["lang"]               = (m["lang"]) ? m["lang"].to!string : "";
-    debug(group) {                             // group (curly) open
-      writefln(
-        "* [group curly] %s",
-        line
-      );
-    }
+    debug(group) { writefln( "* [group curly] %s", line); }                             // group (curly) open
     pith["block_is"]                = eN.blk_is.group;
     pith["block_state"]             = eN.blk_state.on;
     pith["block_delim"]             = eN.blk_delim.curly;
@@ -2934,12 +2832,7 @@ struct retStruct_flow_table_substantive_munge {
     an_object["syntax"]             = "";
     an_object["attrib"]             = (m["attrib"]) ? m["attrib"].to!string : "";
     an_object["lang"]               = (m["lang"]) ? m["lang"].to!string : "";
-    debug(block) {
-      writefln(
-        "* [block curly] %s",
-        line
-      );
-    }
+    debug(block) { writefln( "* [block curly] %s", line); }
     pith["block_is"]                = eN.blk_is.block;
     pith["block_state"]             = eN.blk_state.on;
     pith["block_delim"]             = eN.blk_delim.curly;
@@ -2948,29 +2841,19 @@ struct retStruct_flow_table_substantive_munge {
     an_object["syntax"]             = "";
     an_object["attrib"]             = m["attrib"].to!string;
     an_object["lang"]               = m["lang"].to!string;
-    debug(quote) {
-      writefln(
-        "* [quote curly] %s",
-        line
-      );
-    }
+    debug(quote) { writefln( "* [quote curly] %s", line); }
     pith["block_is"]                = eN.blk_is.quote;
     pith["block_state"]             = eN.blk_state.on;
     pith["block_delim"]             = eN.blk_delim.curly;
-  } else if (auto m = line.matchFirst(rgx.block_curly_table_open)) {           /+ curly table open +/
-    debug(table) {                             // table (curly) open
-      writefln(
-        "* [table curly] %s",
-        line
-      );
-    }
+  } else if (auto m = line.matchFirst(rgx.block_curly_table_open)) {           // curly table open
+    debug(table) { writefln( "* [table curly] %s", line); }
     dochas["table"] ++;
     an_object["table_head"]         = m["attrib"].to!string;
     an_object["block_type"]         = "curly";
     pith["block_is"]                = eN.blk_is.table;
     pith["block_state"]             = eN.blk_state.on;
     pith["block_delim"]             = eN.blk_delim.curly;
-  } else if (auto m = line.matchFirst(rgx.block_curly_table_special_markup)) { /+ table: special table block markup syntax! +/
+  } else if (auto m = line.matchFirst(rgx.block_curly_table_special_markup)) { // table: special table block markup syntax!
     dochas["table"]++;
     an_object["table_head"]         = m["attrib"].to!string;
     an_object["block_type"]         = "special";
@@ -2982,12 +2865,7 @@ struct retStruct_flow_table_substantive_munge {
     an_object["lang"]               = "";
     an_object["attrib"]             = (m["attrib"]) ? m["attrib"].to!string : "";
     an_object["syntax"]             = (m["syntax"]) ? m["syntax"].to!string : "";
-    debug(codetic) {
-      writefln(
-        "* [code tic] %s",
-        line
-      );
-    }
+    debug(codetic) { writefln( "* [code tic] %s", line); }
     pith["block_is"]                = eN.blk_is.code;
     pith["block_state"]             = eN.blk_state.on;
     pith["block_delim"]             = eN.blk_delim.tic;
@@ -2996,12 +2874,7 @@ struct retStruct_flow_table_substantive_munge {
     an_object["syntax"]             = "";
     an_object["attrib"]             = (m["attrib"]) ? m["attrib"].to!string : "";
     an_object["lang"]               = (m["lang"]) ? m["lang"].to!string : "";
-    debug(poem) {
-      writefln(
-        "* [poem tic] %s",
-        line
-      );
-    }
+    debug(poem) { writefln( "* [poem tic] %s", line); }
     object_number_poem["start"]     = obj_cite_digits.object_number.to!string;
     pith["block_is"]                = eN.blk_is.poem;
     pith["block_state"]             = eN.blk_state.on;
@@ -3012,12 +2885,7 @@ struct retStruct_flow_table_substantive_munge {
     an_object["syntax"]             = "";
     an_object["attrib"]             = (m["attrib"]) ? m["attrib"].to!string : "";
     an_object["lang"]               = (m["lang"]) ? m["lang"].to!string : "";
-    debug(group) {
-      writefln(
-        "* [group tic] %s",
-        line
-      );
-    }
+    debug(group) { writefln( "* [group tic] %s", line); }
     pith["block_is"]                = eN.blk_is.group;
     pith["block_state"]             = eN.blk_state.on;
     pith["block_delim"]             = eN.blk_delim.tic;
@@ -3026,12 +2894,7 @@ struct retStruct_flow_table_substantive_munge {
     an_object["syntax"]             = "";
     an_object["attrib"]             = (m["attrib"]) ? m["attrib"].to!string : "";
     an_object["lang"]               = (m["lang"]) ? m["lang"].to!string : "";
-    debug(block) {
-      writefln(
-        "* [block tic] %s",
-        line
-      );
-    }
+    debug(block) { writefln( "* [block tic] %s", line); }
     pith["block_is"]                = eN.blk_is.block;
     pith["block_state"]             = eN.blk_state.on;
     pith["block_delim"]             = eN.blk_delim.tic;
@@ -3040,22 +2903,13 @@ struct retStruct_flow_table_substantive_munge {
     an_object["syntax"]             = "";
     an_object["attrib"]             = m["attrib"].to!string;
     an_object["lang"]               = m["lang"].to!string;
-    debug(quote) {                             // quote (tic) open
-      writefln(
-        "* [quote tic] %s",
-        line
-      );
+    debug(quote) { writefln( "* [quote tic] %s", line);                        // quote (tic) open
     }
     pith["block_is"]                = eN.blk_is.quote;
     pith["block_state"]             = eN.blk_state.on;
     pith["block_delim"]             = eN.blk_delim.tic;
-  } else if (auto m = line.matchFirst(rgx.block_tic_table_open)) {             /+ tic table open +/
-    debug(table) {                             // table (tic) open
-      writefln(
-        "* [table tic] %s",
-        line
-      );
-    }
+  } else if (auto m = line.matchFirst(rgx.block_tic_table_open)) {             // tic table open
+    debug(table) { writefln( "* [table tic] %s", line); }
     dochas["table"] ++;
     an_object["table_head"]         = m["attrib"].to!string;
     an_object["block_type"]         = "tic";
@@ -3080,32 +2934,24 @@ struct retStruct_flow_table_substantive_munge {
   if (pith["block_is"] == eN.blk_is.quote){
     if (pith["block_delim"] == eN.blk_delim.curly) {
       if (line.matchFirst(rgx.block_curly_quote_close)) {
-        debug(quote) {
-          writeln(line);
-        }
+        debug(quote) { writeln(line); }
         an_object[an_object_key]    = an_object[an_object_key].stripRight;
         pith["block_is"]            = eN.blk_is.quote;
         pith["block_state"]         = eN.blk_state.closing;
         pith["block_delim"]         = eN.blk_delim.off;
       } else {
-        debug(quote) {
-          writeln(line);
-        }
+        debug(quote) { writeln(line); }
         an_object[an_object_key] ~= line ~= "\n";
       }
     } else if (pith["block_delim"] == eN.blk_delim.tic) {
       if (line.matchFirst(rgx.block_tic_close)) {
-        debug(quote) {
-          writeln(line);
-        }
+        debug(quote) { writeln(line); }
         an_object[an_object_key]    = an_object[an_object_key].stripRight;
         pith["block_is"]            = eN.blk_is.quote;
         pith["block_state"]         = eN.blk_state.closing;
         pith["block_delim"]         = eN.blk_delim.off;
       } else {
-        debug(quote) {
-          writeln(line);
-        }
+        debug(quote) { writeln(line); }
         an_object[an_object_key] ~= line ~= "\n";
       }
     }
@@ -3126,32 +2972,24 @@ struct retStruct_flow_table_substantive_munge {
   if (pith["block_is"] == eN.blk_is.group) {
     if (pith["block_delim"] == eN.blk_delim.curly) {
       if (line.matchFirst(rgx.block_curly_group_close)) {
-        debug(group) {
-          writeln(line);
-        }
+        debug(group) { writeln(line); }
         an_object[an_object_key]    = an_object[an_object_key].stripRight;
         pith["block_is"]            = eN.blk_is.group;
         pith["block_state"]         = eN.blk_state.closing;
         pith["block_delim"]         = eN.blk_delim.off;
       } else {
-        debug(group) {
-          writeln(line);
-        }
+        debug(group) { writeln(line); }
         an_object[an_object_key] ~= line ~= "\n";
       }
     } else if (pith["block_delim"] == eN.blk_delim.tic) {
       if (line.matchFirst(rgx.block_tic_close)) {
-        debug(group) {
-          writeln(line);
-        }
+        debug(group) { writeln(line); }
         an_object[an_object_key]    = an_object[an_object_key].stripRight;
         pith["block_is"]            = eN.blk_is.group;
         pith["block_state"]         = eN.blk_state.closing;
         pith["block_delim"]         = eN.blk_delim.off;
       } else {
-        debug(group) {
-          writeln(line);
-        }
+        debug(group) { writeln(line); }
         an_object[an_object_key] ~= line ~= "\n";
       }
     }
@@ -3172,32 +3010,24 @@ struct retStruct_flow_table_substantive_munge {
   if (pith["block_is"] == eN.blk_is.block) {
     if (pith["block_delim"] == eN.blk_delim.curly) {
       if (line.matchFirst(rgx.block_curly_block_close)) {
-        debug(block) {
-          writeln(line);
-        }
+        debug(block) { writeln(line); }
         an_object[an_object_key]    = an_object[an_object_key].stripRight;
         pith["block_is"]            = eN.blk_is.block;
         pith["block_state"]         = eN.blk_state.closing;
         pith["block_delim"]         = eN.blk_delim.off;
       } else {
-        debug(block) {
-          writeln(line);
-        }
+        debug(block) { writeln(line); }
         an_object[an_object_key] ~= line ~= "\n";
       }
     } else if (pith["block_delim"] == eN.blk_delim.tic) {
       if (line.matchFirst(rgx.block_tic_close)) {
-        debug(block) {
-          writeln(line);
-        }
+        debug(block) { writeln(line); }
         an_object[an_object_key]    = an_object[an_object_key].stripRight;
         pith["block_is"]            = eN.blk_is.block;
         pith["block_state"]         = eN.blk_state.closing;
         pith["block_delim"]         = eN.blk_delim.off;
       } else {
-        debug(block) {
-          writeln(line);
-        }
+        debug(block) { writeln(line); }
         an_object[an_object_key] ~= line ~= "\n";
       }
     }
@@ -3225,30 +3055,16 @@ struct retStruct_flow_table_substantive_munge {
         if (an_object_key in an_object
         || processing.length > 0) {
           an_object[an_object_key]        = "";
-          debug(poem) {
-            writefln(
-              "* [poem curly] %s",
-              line
-            );
-          }
+          debug(poem) { writefln( "* [poem curly] %s", line); }
           if (processing.length > 0) {
             an_object[an_object_key]      = processing["verse"];
           }
           debug(poem) {
             writeln(__LINE__);
-            writefln(
-              "* %s %s",
-              obj_cite_digits.object_number,
-              line
-            );
+            writefln( "* %s %s", obj_cite_digits.object_number, line);
           }
           if (an_object.length > 0) {
-            debug(poem) {
-              writeln(
-                obj_cite_digits.object_number,
-                an_object[an_object_key]
-              );
-            }
+            debug(poem) { writeln( obj_cite_digits.object_number, an_object[an_object_key]); }
             an_object["is"]                                   = "verse";
             TxtAndAnchorTagPlusHasFootnotesUrlsImages substantive_obj_misc_tuple
               = obj_im.obj_inline_markup_and_anchor_tags_and_misc(an_object, an_object_key, conf_make_meta, No._new_doc);
@@ -3294,8 +3110,7 @@ struct retStruct_flow_table_substantive_munge {
         if (pith["verse_new"] == eN.bi.on) {
           verse_line = 1;
           an_object[an_object_key]  = processing["verse"];
-          debug(poem) {
-            writefln(
+          debug(poem) { writefln(
               "* %s curly\n%s",
               obj_cite_digits.object_number,
               an_object[an_object_key]
@@ -3343,20 +3158,12 @@ struct retStruct_flow_table_substantive_munge {
     } else if (pith["block_delim"] == eN.blk_delim.tic) {
       if (auto m = line.matchFirst(rgx.block_tic_close)) {
         an_object[an_object_key] = "verse";
-        debug(poem) {
-          writefln(
-            "* [poem tic] %s",
-            line
-          );
-        }
+        debug(poem) { writefln( "* [poem tic] %s", line); }
         if (processing.length > 0) {
           an_object[an_object_key]  = processing["verse"];
         }
         if (an_object.length > 0) {
-          debug(poem) {
-            writeln(__LINE__);
-            writeln(obj_cite_digits.object_number, line);
-          }
+          debug(poem) { writeln(__LINE__); writeln(obj_cite_digits.object_number, line); }
           processing.remove("verse");
           an_object["is"]                                     = "verse";
           TxtAndAnchorTagPlusHasFootnotesUrlsImages substantive_obj_misc_tuple
@@ -3402,8 +3209,7 @@ struct retStruct_flow_table_substantive_munge {
         if (pith["verse_new"] == eN.bi.on) {
           verse_line = 1;
           an_object[an_object_key]  = processing["verse"];
-          debug(poem) {
-            writefln(
+          debug(poem) { writefln(
               "* %s tic\n%s",
               obj_cite_digits.object_number,
               an_object[an_object_key]
@@ -3468,9 +3274,7 @@ struct retStruct_flow_table_substantive_munge {
   if ( pith["block_is"] == eN.blk_is.code) {
     if (pith["block_delim"] == eN.blk_delim.curly) {
       if (line.matchFirst(rgx.block_curly_code_close)) {
-        debug(codecurly) {
-          writeln(line);
-        }
+        debug(codecurly) { writeln(line); }
         an_object[an_object_key] = an_object[an_object_key]
           .replaceFirst(rgx.newline_eol_delimiter_only, "")
           .stripRight;
@@ -3478,16 +3282,12 @@ struct retStruct_flow_table_substantive_munge {
         pith["block_state"]         = eN.blk_state.closing;
         pith["block_delim"]         = eN.blk_delim.off;
       } else {
-        debug(codecurly) {
-          writeln(line);
-        }
+        debug(codecurly) { writeln(line); }
         an_object[an_object_key] ~= line ~= "\n";
       }
     } else if (pith["block_delim"] == eN.blk_delim.tic) {
       if (line.matchFirst(rgx.block_tic_close)) {
-        debug(codetic) {
-          writeln(line);
-        }
+        debug(codetic) { writeln(line); }
         an_object[an_object_key] = an_object[an_object_key]
           .replaceFirst(rgx.newline_eol_delimiter_only, "")
           .stripRight;
@@ -3495,9 +3295,7 @@ struct retStruct_flow_table_substantive_munge {
         pith["block_state"]         = eN.blk_state.closing;
         pith["block_delim"]         = eN.blk_delim.off;
       } else {
-        debug(codetic) {
-          writeln(line);
-        }
+        debug(codetic) { writeln(line); }
         an_object[an_object_key] ~= line ~= "\n";
       }
     }
@@ -3519,16 +3317,12 @@ struct retStruct_flow_table_substantive_munge {
   if (pith["block_is"] == eN.blk_is.table) {
     if (pith["block_delim"] == eN.blk_delim.curly) {
       if (line.matchFirst(rgx.block_curly_table_close)) {
-        debug(table) {
-          writeln(line);
-        }
+        debug(table) { writeln(line); }
         pith["block_is"]            = eN.blk_is.table;
         pith["block_state"]         = eN.blk_state.closing;
         pith["block_delim"]         = eN.blk_delim.off;
       } else {
-        debug(table) {
-          writeln(line);
-        }
+        debug(table) { writeln(line); }
         an_object[an_object_key] ~= line ~= "\n";
       }
     } else if (pith["block_delim"] == eN.blk_delim.curly_special) {
@@ -3556,23 +3350,17 @@ struct retStruct_flow_table_substantive_munge {
           }
         }
       } else {
-        debug(table) {
-          writeln(line);
-        }
+        debug(table) { writeln(line); }
         an_object[an_object_key] ~= line ~= "\n";
       }
     } else if (pith["block_delim"] == eN.blk_delim.tic) {
       if (line.matchFirst(rgx.block_tic_close)) {
-        debug(table) {
-          writeln(line);
-        }
+        debug(table) { writeln(line); }
         pith["block_is"]            = eN.blk_is.table;
         pith["block_state"]         = eN.blk_state.closing;
         pith["block_delim"]         = eN.blk_delim.off;
       } else {
-        debug(table) {
-          writeln(line);
-        }
+        debug(table) { writeln(line); }
         an_object[an_object_key] ~= line ~= "\n";
       }
     }
@@ -3624,12 +3412,8 @@ struct retStruct_flow_table_substantive_munge {
   }
   if (line.empty) {
     debug {
-      debug(biblioblock) {
-        writeln("---");
-      }
-      debug(biblioblockinclude) {
-        writeln(biblio_entry_str_json.length);
-      }
+      debug(biblioblock) { writeln("---"); }
+      debug(biblioblockinclude) { writeln(biblio_entry_str_json.length); }
     }
     if ((bib_entry == eN.bi.off)
     && (biblio_entry_str_json.empty)) {
@@ -3653,9 +3437,7 @@ struct retStruct_flow_table_substantive_munge {
       biblio_entry_str_json = "";
     }
   } else if (line.matchFirst(rgx.biblio_tags)) {
-    debug(biblioblock) {
-      writeln(line);
-    }
+    debug(biblioblock) { writeln(line); }
     auto bt = line.match(rgx.biblio_tags);
     bib_entry = eN.bi.off;
     st = bt.captures[1].to!string;
@@ -3665,10 +3447,7 @@ struct retStruct_flow_table_substantive_munge {
       ? (biblio_tag_map(st))
       : st;
     j.object[biblio_tag_name] = header_tag_value;
-    debug(bibliounsortedcheckduplicates) {
-      writeln(biblio_tag_name, ": ", header_tag_value);
-      writeln("--");
-    }
+    debug(bibliounsortedcheckduplicates) { writeln(biblio_tag_name, ": ", header_tag_value); writeln("--"); }
     switch (biblio_tag_name) {
     case "author_raw": // author_arr author (fn sn)
       j["author_arr"]
@@ -3706,8 +3485,7 @@ struct retStruct_flow_table_substantive_munge {
       break;
     }
     auto s = j.toString();
-    debug(biblio1) {
-      writefln(
+    debug(biblio1) { writefln(
         "* %s: %s\n%s",
         biblio_tag_name,
         biblio_tag_entry,
@@ -3719,9 +3497,7 @@ struct retStruct_flow_table_substantive_munge {
       writeln("ERROR", s, "%%");
     }
     if (!(match(line, rgx.comment))) {
-      debug(biblioblockinclude) {
-        writeln(line);
-      }
+      debug(biblioblockinclude) { writeln(line); }
       biblio_entry_str_json = s;
     } else {
       biblio_entry_str_json = "";
@@ -3737,7 +3513,7 @@ struct retStruct_flow_table_substantive_munge {
   }
   return ret;
 }
-                                                                              /+ ↓ abstraction functions +/
+// ↓ abstraction functions
 @safe static string[string] object_reset()(string[string] an_object) {
   an_object.remove("body_nugget");
   an_object.remove("substantive");
@@ -3753,22 +3529,18 @@ struct retStruct_flow_table_substantive_munge {
   static auto rgx = RgxI();
   if (!(line.empty)) {
     if (pith["no_ocn_multiple_objects"] == eN.bi.off) {
-      /+ not multi-line object, check whether object_number is on or turned off +/
-      if (line.matchFirst(rgx.object_number_block_marks)) {                      /+ switch off object_number +/
+      // not multi-line object, check whether object_number is on or turned off
+      if (line.matchFirst(rgx.object_number_block_marks)) {                      // switch off object_number
         if (line.matchFirst(rgx.object_number_off_block)) {
           pith["no_ocn_multiple_objects"]             = eN.bi.on;
           pith["ocn"]                                 = eN.ocn.off;
-          debug(ocnoff) {
-            writeln(line);
-          }
+          debug(ocnoff) { writeln(line); }
         }
         if (line.matchFirst(rgx.object_number_off_block_dummy_heading)) {
           pith["no_ocn_multiple_objects"]             = eN.bi.on;
           pith["dummy_heading_multiple_objects"]      = eN.bi.on;
           pith["ocn"]                                 = eN.ocn.off;
-          debug(ocnoff) {
-            writeln(line);
-          }
+          debug(ocnoff) { writeln(line); }
         }
       } else if (pith["no_ocn_multiple_objects"] == eN.bi.off) {
           pith["dummy_heading_status"]                = eN.bi.off;
@@ -3792,9 +3564,7 @@ struct retStruct_flow_table_substantive_munge {
         pith["no_ocn_multiple_objects"]               = eN.bi.off;
         pith["ocn"]                                   = eN.ocn.on;
         pith["dummy_heading_status"]                  = eN.bi.off;
-        debug(ocnoff) {
-          writeln(line);
-        }
+        debug(ocnoff) { writeln(line); }
       }
     }
   }
@@ -4237,37 +4007,26 @@ struct retStruct_flow_table_substantive_munge {
   B               opt_action,
 ) {
   static auto rgx = RgxI();
-  if (auto m = line.match(rgx.book_index_item)) {                                   /+ match book_index +/
-    debug(bookindexmatch) {
-      writefln(
+  if (auto m = line.match(rgx.book_index_item)) {                                   // match book_index
+    debug(bookindexmatch) { writefln(
         "* [bookindex] %s\n",
         m["bookindex"].to!string,
       );
     }
     an_object["bookindex_nugget"] = m.captures[1].to!string;
-  } else if (auto m = line.match(rgx.book_index_item_open))  {                      /+ match open book_index +/
+  } else if (auto m = line.match(rgx.book_index_item_open))  {                      // match open book_index
     pith["section"] = eN.sect.book_index;
     if (opt_action.backmatter && opt_action.section_bookindex) {
       book_idx_tmp = m.captures[1].to!string;
-      debug(bookindexmatch) {
-        writefln(
-          "* [bookindex] %s\n",
-          book_idx_tmp,
-        );
-      }
+      debug(bookindexmatch) { writefln( "* [bookindex] %s\n", book_idx_tmp,); }
     }
-  } else if (pith["section"] == eN.sect.book_index)  {                    /+ book_index flag set +/
+  } else if (pith["section"] == eN.sect.book_index)  {                    // book_index flag set
     if (auto m = line.match(rgx.book_index_item_close))  {
       pith["section"] = eN.sect.unset;
       if (opt_action.backmatter
       && opt_action.section_bookindex) {
         an_object["bookindex_nugget"] = book_idx_tmp ~ m.captures[1].to!string;
-        debug(bookindexmatch) {
-          writefln(
-            "* [bookindex] %s\n",
-            book_idx_tmp,
-          );
-        }
+        debug(bookindexmatch) { writefln( "* [bookindex] %s\n", book_idx_tmp,); }
       }
       book_idx_tmp = "";
     } else {
@@ -4294,10 +4053,8 @@ struct retStruct_flow_table_substantive_munge {
 ) {
   static auto rgx = RgxI();
   if ((_make_unmarked_headings.length > 2)
-  && (pith["make_headings"] == eN.bi.off)) {                        /+ headings found +/
-    debug(headingsfound) {
-      writeln(_make_unmarked_headings);
-    }
+  && (pith["make_headings"] == eN.bi.off)) {                        // headings found
+    debug(headingsfound) { writeln(_make_unmarked_headings); }
     debug(headingsfound) {
       writeln(_make_unmarked_headings.length);
       writeln(_make_unmarked_headings);
@@ -4382,48 +4139,34 @@ struct retStruct_flow_table_substantive_munge {
     && (line_occur["para"] == eN.bi.off
     && line_occur["heading"] == eN.bi.off)
     && pith["txt_is"] == eN.txt_is.off
-  ) {                             /+ heading make set +/
+  ) {                             // heading make set
     if (line.matchFirst(heading_match_rgx["h_B"])) {
       line = "B~ " ~ line;
-      debug(headingsfound) {
-        writeln(line);
-      }
+      debug(headingsfound) { writeln(line); }
     }
     if (line.matchFirst(heading_match_rgx["h_C"])) {
       line = "C~ " ~ line;
-      debug(headingsfound) {
-        writeln(line);
-      }
+      debug(headingsfound) { writeln(line); }
     }
     if (line.matchFirst(heading_match_rgx["h_D"])) {
       line = "D~ " ~ line;
-      debug(headingsfound) {
-        writeln(line);
-      }
+      debug(headingsfound) { writeln(line); }
     }
     if (line.matchFirst(heading_match_rgx["h_1"])) {
       line = "1~ " ~ line;
-      debug(headingsfound) {
-        writeln(line);
-      }
+      debug(headingsfound) { writeln(line); }
     }
     if (line.matchFirst(heading_match_rgx["h_2"])) {
       line = "2~ " ~ line;
-      debug(headingsfound) {
-        writeln(line);
-      }
+      debug(headingsfound) { writeln(line); }
     }
     if (line.matchFirst(heading_match_rgx["h_3"])) {
       line = "3~ " ~ line;
-      debug(headingsfound) {
-        writeln(line);
-      }
+      debug(headingsfound) { writeln(line); }
     }
     if (line.matchFirst(heading_match_rgx["h_4"])) {
       line = "4~ " ~ line;
-      debug(headingsfound) {
-        writeln(line);
-      }
+      debug(headingsfound) { writeln(line); }
     }
   }
   retStruct_flow_heading_make_set ret;
@@ -4446,7 +4189,7 @@ struct retStruct_flow_table_substantive_munge {
 ) {
   static auto rgx = RgxI();
   static auto mkup = InlineMarkup();
-  if (auto m = line.match(rgx.headings)) {                                      /+ heading match +/
+  if (auto m = line.match(rgx.headings)) {                                      // heading match
     ++line_occur["heading"];
     pith["txt_is"]           = eN.txt_is.heading;
     if (line.match(rgx.heading_seg_and_above)) {
@@ -4600,9 +4343,7 @@ struct retStruct_flow_table_substantive_munge {
       an_object["lev_markup_number"] = lv["lv"].to!string;
     }
     an_object["dummy_heading_status"] = (pith["dummy_heading_status"] == eN.bi.off) ? "f" : "t";
-    debug(heading) {
-      writeln(line.strip);
-    }
+    debug(heading) { writeln(line.strip); }
   }
   struct retStruct_flow_heading_matched {
     string[string]  this_object;
@@ -4637,7 +4378,7 @@ struct retStruct_flow_table_substantive_munge {
   static auto rgx = RgxI();
   if (line_occur["para"] == eN.bi.off) {
     line = font_faces_line(line);
-    /+ para matches +/
+    // para matches
     pith["txt_is"]           = eN.txt_is.para;
     an_object[an_object_key] ~= line;
     indent = [
@@ -4646,28 +4387,20 @@ struct retStruct_flow_table_substantive_munge {
     ];
     bullet = false;
     if (auto m = line.matchFirst(rgx.para_indent)) {
-      debug(paraindent) {
-        writeln(line);
-      }
+      debug(paraindent) { writeln(line); }
       indent["hang_position"] = (m["indent"]).to!int;
       indent["base_position"] = (m["indent"]).to!int;
     } else if (line.matchFirst(rgx.para_bullet)) {
-      debug(parabullet) {
-        writeln(line);
-      }
+      debug(parabullet) { writeln(line); }
       bullet = true;
     } else if (auto m = line.matchFirst(rgx.para_indent_hang)) {
-      debug(paraindenthang) {
-        writeln(line);
-      }
+      debug(paraindenthang) { writeln(line); }
       indent = [
         "hang_position" : (m["hang"]).to!int,
         "base_position" : (m["indent"]).to!int,
       ];
     } else if (auto m = line.matchFirst(rgx.para_bullet_indent)) {
-      debug(parabulletindent) {
-        writeln(line);
-      }
+      debug(parabulletindent) { writeln(line); }
       indent = [
         "hang_position" : (m["indent"]).to!int,
         "base_position" : (m["indent"]).to!int,
@@ -4745,9 +4478,7 @@ struct retStruct_flow_table_substantive_munge {
   ulong col_num_;
   ulong col_num_chk = 0;
   foreach(idx_r, row; table_array) {
-    debug(table_dev) {
-      writeln("row ", idx_r);
-    }
+    debug(table_dev) { writeln("row ", idx_r); }
     col_num_ = 0;
     if (col_num == 0
     || col_num < row.length) {
@@ -4756,19 +4487,13 @@ struct retStruct_flow_table_substantive_munge {
     if (col_num_chk == 0) {
       col_num_chk = col_num;
     } else if (col_num == 1) {
-      debug(table_dev) {
-        writeln("table note: ");
-      }
+      debug(table_dev) { writeln("table note: "); }
     } else if (col_num_chk != col_num) {
-      debug(table_dev) {
-        writeln("warning irregular number of columns: ", col_num_chk, " != ", col_num);
-      }
+      debug(table_dev) { writeln("warning irregular number of columns: ", col_num_chk, " != ", col_num); }
     } else {
     }
     foreach(idx_c, col; row) {
-      debug(table_dev) {
-        write(idx_c, ", ");
-      }
+      debug(table_dev) { write(idx_c, ", "); }
       col_num_ = idx_c;
       _table_substantive ~= col ~ mng.tc_s;
       if (idx_r == 0 && table_object.table.heading) {
@@ -4792,9 +4517,7 @@ struct retStruct_flow_table_substantive_munge {
         }
       }
     }
-    debug(table_dev) {
-      writeln("");
-    }
+    debug(table_dev) { writeln(""); }
     if (col_num_chk > 0 && (col_num != col_num_chk)) {
     } else if (col_num == col_num_chk){
     } else {
@@ -4806,9 +4529,7 @@ struct retStruct_flow_table_substantive_munge {
     if (table_object.table.number_of_columns == 0) {
       table_object.table.number_of_columns = (col_num).to!int;
     } else {
-      debug(table_dev) {
-        writeln(table_object.table.number_of_columns, " != ", col_num);
-      }
+      debug(table_dev) { writeln(table_object.table.number_of_columns, " != ", col_num); }
     }
   }
   if (table_object.table.number_of_columns == 0
@@ -4823,9 +4544,7 @@ struct retStruct_flow_table_substantive_munge {
     }
   } else if (table_object.table.number_of_columns
   != table_object.table.column_widths.length) {
-    debug(table_dev) {
-      writeln(m.hit); // further logic required
-    }
+    debug(table_dev) { writeln(m.hit); } // further logic required
     if (table_object.table.number_of_columns > table_object.table.column_widths.length) {
       double col_w = (100.00 - (table_object.table.column_widths).sum)
         / (table_object.table.number_of_columns - table_object.table.column_widths.length);
@@ -4915,8 +4634,8 @@ struct retStruct_flow_table_substantive_munge {
   }
   return ret;
 }
-/+ abstraction functions ↑ +/
-/+ ↓ abstraction function emitters +/
+// abstraction functions ↑
+// ↓ abstraction function emitters
 @safe pure struct OCNemitter {
   int ocn_digit, ocn_object_number, ocn_on_, ocn_off_, ocn_bkidx, ocn_bkidx_;
   string object_identifier;
@@ -4965,7 +4684,6 @@ struct retStruct_flow_table_substantive_munge {
   invariant() {
   }
 }
-                                                                              /+ +/
 @safe static struct ObjInlineMarkupMunge {
   string[string] obj_txt;
   int n_foot, n_foot_reg, n_foot_sp_asterisk, n_foot_sp_plus;
@@ -4982,36 +4700,30 @@ struct retStruct_flow_table_substantive_munge {
   }
   @safe static auto images()(string obj_txt_in) {
     static auto mng = InlineMarkup();
-    /+ url matched +/
+    // url matched
     obj_txt_in = obj_txt_in.replaceAll(rgx.inline_notes_al_special, ""); // TODO reinstate when special footnotes are implemented
-    if (obj_txt_in.match(rgx.smid_image_generic)) {                            /+ images with and without links +/
-      debug(images) {
-        writeln("Image: ", obj_txt_in);
-      }
+    if (obj_txt_in.match(rgx.smid_image_generic)) {                            // images with and without links
+      debug(images) { writeln("Image: ", obj_txt_in); }
       if (obj_txt_in.match(rgx.smid_image_with_dimensions)) {
         obj_txt_in = obj_txt_in
           .replaceAll(rgx.smid_image_with_dimensions, ("$1" ~ mkup.img ~ "$2,w$3h$4 " ~ "$5"))
           .replaceAll(rgx.smid_image_delimit, ("$1"
             ~ mkup.lnk_o ~ "$2".strip ~ mkup.lnk_c
             ~ mkup.url_o ~ mkup.url_c));
-        debug(images) {
-          writeln("IMAGE with size: ", obj_txt_in);
-        }
+        debug(images) { writeln("IMAGE with size: ", obj_txt_in); }
       } else if (obj_txt_in.match(rgx.smid_image)) {
         obj_txt_in = obj_txt_in
           .replaceAll(rgx.smid_image, ("$1" ~ mkup.img ~ "$2,w0h0" ~ "$3"))
           .replaceAll(rgx.smid_image_delimit, ("$1"
             ~ mkup.lnk_o ~ "$2".strip ~ mkup.lnk_c
             ~ mkup.url_o ~ mkup.url_c));
-        debug(images) {
-          writeln("IMAGE: ", obj_txt_in); // decide on representation
-        }
+        debug(images) { writeln("IMAGE: ", obj_txt_in); } // decide on representation
       }
     }
     return obj_txt_in;
   }
   @safe TxtPlusHasFootnotes footnotes_endnotes_markup_and_number_or_stars()(string obj_txt_in, bool reset_note_numbers) {
-    /+ endnotes (regular) +/
+    // endnotes (regular)
     bool flg_notes_reg  = false;
     bool flg_notes_star = false;
     bool flg_notes_plus = false;
@@ -5089,7 +4801,7 @@ struct retStruct_flow_table_substantive_munge {
     bool urls = false;
     bool images_without_dimensions = false;
     tail = "";
-    /+ special endnotes +/
+    // special endnotes
     obj_txt_in = obj_txt_in.replaceAll(
       rgx.inline_notes_curly_sp_asterisk,
       (mkup.en_a_o ~ "*" ~ " $1" ~ mkup.en_a_c)
@@ -5099,14 +4811,14 @@ struct retStruct_flow_table_substantive_munge {
         rgx.inline_notes_curly_sp_plus,
         (mkup.en_a_o ~ "+" ~ " $1" ~ mkup.en_a_c)
       );
-    /+ image matched +/
+    // image matched
     if (obj_txt_in.match(rgx.smid_image_generic)) {
       obj_txt_in = images(obj_txt_in);
       if (obj_txt_in.match(rgx.smid_mod_image_without_dimensions)) {
         images_without_dimensions = true;
       }
     }
-    /+ url matched +/
+    // url matched
     if (obj_txt_in.match(rgx.smid_inline_url)) {
       urls = true;
       obj_txt_in = obj_txt_in.links_and_images;
@@ -5117,13 +4829,10 @@ struct retStruct_flow_table_substantive_munge {
     }
     TxtPlusHasFootnotes ftn = footnotes_endnotes_markup_and_number_or_stars(obj_txt_in, reset_note_numbers);
     obj_txt_out = ftn.obj_txt;
-    debug(footnotes) {
-      writeln(obj_txt_out, tail);
-    }
+    debug(footnotes) { writeln(obj_txt_out, tail); }
     obj_txt_out = obj_txt_out ~ tail;
     debug(footnotesdone) {
-      foreach(m; matchAll(obj_txt_out,
-      (mkup.en_a_o ~ `\s*(.+?)` ~ mkup.en_a_c))) {
+      foreach(m; matchAll(obj_txt_out, (mkup.en_a_o ~ `\s*(.+?)` ~ mkup.en_a_c))) {
         writeln(m[1]);
         writeln(m.hit);
       }
@@ -5444,8 +5153,8 @@ private:
         heading_num[3]                    = 0;
         heading_number_auto_composite     = "";
       }
-      /+ auto_num_depth minimum 0
-         (1.) default 2 (1.1.1) max 3 (1.1.1.1) implement +/
+      // auto_num_depth minimum 0
+      // (1.) default 2 (1.1.1) max 3 (1.1.1.1) implement
       if (
         conf_make_meta.make.auto_num_top_lv
         > obj_["lev_markup_number"].to!uint
@@ -5554,9 +5263,7 @@ private:
         (heading_number_auto_composite.empty)
           ? ""
           : "seg_" ~ heading_number_auto_composite;
-      debug(heading_number_auto) {
-        writeln(heading_number_auto_composite);
-      }
+      debug(heading_number_auto) { writeln(heading_number_auto_composite); }
       if ((!empty(heading_number_auto_composite))
       && (obj_["lev_markup_number"].to!uint >= conf_make_meta.make.auto_num_top_lv)) {
         munge_ = munge_
@@ -5603,7 +5310,6 @@ private:
     return munge_;
   }
 }
-                                                                              /+ +/
 struct ObjAttributes {
   string[string] _obj_attrib;
   @safe string obj_attributes()(
@@ -5787,7 +5493,6 @@ struct ObjAttributes {
     return _obj_attrib;
   }
 }
-                                                                              /+ +/
 struct BookIndexNuggetHash {
   string main_term, sub_term, sub_term_bits;
   int object_number_offset, object_number_endpoint;
@@ -5799,9 +5504,7 @@ struct BookIndexNuggetHash {
     OCNset obj_cite_digits,
     S      tag_in_seg,
   ) {
-    debug(asserts) {
-      static assert(is(typeof(obj_cite_digits.object_number) == int));
-    }
+    debug(asserts) { static assert(is(typeof(obj_cite_digits.object_number) == int)); }
     debug(bookindexraw) {
       if (!bookindex_section.empty) {
         writeln(
@@ -5870,9 +5573,7 @@ struct BookIndexReportIndent {
     auto mainkeys
       = bookindex_unordered_hashes.byKey.array.sort().release;
     foreach (mainkey; mainkeys) {
-      debug(bookindex1) {
-        writeln(mainkey);
-      }
+      debug(bookindex1) { writeln(mainkey); }
       auto subkeys
         = bookindex_unordered_hashes[mainkey].byKey.array.sort().release;
       foreach (subkey; subkeys) {
@@ -5926,9 +5627,7 @@ struct BookIndexReportSection {
     OCNset                   obj_cite_digits,
     B                        opt_action,
   ) {
-    debug(asserts) {
-      static assert(is(typeof(obj_cite_digits.object_number)             == int));
-    }
+    debug(asserts) { static assert(is(typeof(obj_cite_digits.object_number) == int)); }
     mixin spineNode;
     mixin InternalMarkup;
     static auto mkup = InlineMarkup();
@@ -6079,7 +5778,6 @@ struct BookIndexReportSection {
     return t;
   }
 }
-                                                                              /+ +/
 struct NotesSection {
   string[string] object_notes;
   int previous_count;
@@ -6109,8 +5807,7 @@ struct NotesSection {
       (contents_am[cntr].text).matchAll(
         rgx.inline_notes_al_special_char_note)
     ) {
-      debug(endnotes_build) {
-        writeln(
+      debug(endnotes_build) { writeln(
           "{", mkup.ff_i, mkup.superscript, mkup.ff_o, m["char"], ".", mkup.ff_c, mkup.superscript, "}"
           ~ mkup.mark_internal_site_lnk,
           tag_in_seg["seg_lv4"],
@@ -6138,8 +5835,7 @@ struct NotesSection {
       (contents_am[cntr].text).matchAll(
         rgx.inline_notes_al_regular_number_note)
     ) {
-      debug(endnotes_build) {
-        writeln(
+      debug(endnotes_build) { writeln(
           "{", mkup.ff_i, mkup.superscipt, mkup.ff_o, m["num"], ".", mkup.ff_c, mkup.superscipt, "}"
           ~ mkup.mark_internal_site_lnk,
           tag_in_seg["seg_lv4"],
@@ -6287,7 +5983,6 @@ struct NotesSection {
     return t;
   }
 }
-                                                                              /+ +/
 struct Bibliography {
   @system public retStruct_flow_bibliography flow_bibliography_()(
     string[]    biblio_unsorted_incomplete,
@@ -6325,10 +6020,9 @@ struct Bibliography {
     JSONValue[]   bib_arr_json
   ) {
     foreach (bibent; biblio_unordered) {
-      /+ update bib to include deemed_author, needed for:
-        sort_bibliography_array_by_deemed_author_year_title
-        either: sort on multiple fields, or; create such sort field
-      +/
+      // update bib to include deemed_author, needed for:
+      // sort_bibliography_array_by_deemed_author_year_title
+      // either: sort on multiple fields, or; create such sort field
       JSONValue j = parseJSON(bibent);
       if (!empty(j["fulltitle"].str)) {
         if (!empty(j["author_raw"].str)) {
@@ -6356,9 +6050,7 @@ struct Bibliography {
       })(biblio_unordered).array;
     debug(bibliosorted) {
       foreach (j; biblio_sorted_) {
-        if (!empty(j["fulltitle"].str)) {
-          writeln(j["sortby_deemed_author_year_title"]);
-        }
+        if (!empty(j["fulltitle"].str)) { writeln(j["sortby_deemed_author_year_title"]); }
       }
     }
     return biblio_sorted_;
@@ -6366,14 +6058,11 @@ struct Bibliography {
   @system void biblio_debug()(JSONValue[] biblio_sorted) {
     debug(biblio0) {
       foreach (j; biblio_sorted) {
-        if (!empty(j["fulltitle"].str)) {
-          writeln(j["sortby_deemed_author_year_title"]);
-        }
+        if (!empty(j["fulltitle"].str)) { writeln(j["sortby_deemed_author_year_title"]); }
       }
     }
   }
 }
-                                                                              /+ +/
 struct NodeStructureMetadata {
   int lv, lv0, lv1, lv2, lv3, lv4, lv5, lv6, lv7;
   int obj_cite_digit;
@@ -6389,9 +6078,7 @@ struct NodeStructureMetadata {
     int            ptr_,
     string         is_
   ) {
-    debug(asserts) {
-      static assert(is(typeof(obj_cite_digits.object_number) == int));
-    }
+    debug(asserts) { static assert(is(typeof(obj_cite_digits.object_number) == int)); }
     assert(is_ != "heading");
     assert(obj_cite_digits.object_number.to!int >= 0);
     assert(is_ != "heading");                          // should not be necessary
@@ -6420,11 +6107,8 @@ struct NodeStructureMetadata {
     comp_obj_location.metainfo.parent_ocn           = p_["object_number"];
     comp_obj_location.metainfo.parent_lev_markup    = p_["lev_markup_number"];
     debug(_node) {
-      if (lev_markup_number.match(rgx.levels_numbered_headings)) {
-        writeln("x ", _node.to!string);
-      } else {
-        writeln("- ", _node.to!string);
-      }
+      if (lev_markup_number.match(rgx.levels_numbered_headings)) { writeln("x ", _node.to!string);
+      } else { writeln("- ", _node.to!string); }
     }
     assert(comp_obj_location.metainfo.parent_lev_markup >= 4);
     assert(comp_obj_location.metainfo.parent_lev_markup <= 7);
@@ -6463,14 +6147,13 @@ struct NodeStructureMetadata {
     );
     if (lev_markup_number.match(rgx.levels_numbered)) {
       if (lev_markup_number.to!int == 0) {
-        /+ TODO first hit (of two) with this assertion failure, check, fix & reinstate
-        assert(obj_cite_digits.object_number.to!int == 1,
-          "ERROR header lev markup number is: " ~
-          lev_markup_number.to!string ~
-          " obj_cite_digits.object_number.to!int should == 1 but is: " ~
-           obj_cite_digits.object_number.to!string ~
-          "\n" ~ _text);
-        +/
+        // TODO first hit (of two) with this assertion failure, check, fix & reinstate
+        // assert(obj_cite_digits.object_number.to!int == 1,
+        //   "ERROR header lev markup number is: " ~
+        //   lev_markup_number.to!string ~
+        //   " obj_cite_digits.object_number.to!int should == 1 but is: " ~
+        //    obj_cite_digits.object_number.to!string ~
+        //   "\n" ~ _text);
       }
     }
     switch (lev_markup_number.to!int) {
@@ -6586,14 +6269,10 @@ struct NodeStructureMetadata {
     tag_assoc[_comp_obj_heading_.tags.anchor_tag_html]["seg_lv4"]            = _comp_obj_heading_.tags.in_segment_html;
     tag_assoc[_comp_obj_heading_.tags.segment_anchor_tag_epub]["seg_lv1to4"] = _comp_obj_heading_.tags.segment_anchor_tag_epub;
     debug(_node) {
-      if (lev_markup_number.match(rgx.levels_numbered_headings)) {
-        writeln("* ", _node.to!string);
-      }
+      if (lev_markup_number.match(rgx.levels_numbered_headings)) { writeln("* ", _node.to!string); }
     }
     debug(nodeheading) {
-      if (lev_markup_number.match(rgx.levels_numbered_headings)) {
-        writeln("* ", _node.to!string);
-      }
+      if (lev_markup_number.match(rgx.levels_numbered_headings)) { writeln("* ", _node.to!string); }
     }
     assert(_comp_obj_heading_.metainfo.parent_lev_markup <= 7);
     assert(_comp_obj_heading_.metainfo.parent_ocn >= 0);
@@ -6630,8 +6309,8 @@ struct NodeStructureMetadata {
   invariant() {
   }
 }
-                                                                              /+ abstraction functions emitters ↑ +/
-                                                                              /+ ↓ abstraction functions assertions +/
+// abstraction functions emitters ↑
+// ↓ abstraction functions assertions
 @safe pure void assertions_doc_structure()(
   string[string]  an_object,
   string          an_object_key,
@@ -7202,7 +6881,7 @@ struct NodeStructureMetadata {
     break;
   }
 }
-/+ abstraction functions assertions ↑ +/
+// abstraction functions assertions ↑
 #+END_SRC
 
 * template docSectKeysSeq
diff --git a/src/doc_reform/meta/metadoc_from_src.d b/src/doc_reform/meta/metadoc_from_src.d
index da8949e..d8b3b75 100644
--- a/src/doc_reform/meta/metadoc_from_src.d
+++ b/src/doc_reform/meta/metadoc_from_src.d
@@ -47,14 +47,12 @@
     [https://git.sisudoc.org/projects/?p=software/spine.git;a=summary]
 
 +/
-/++
-  document abstraction:
-  abstraction of sisu markup for downstream processing
-  metadoc_from_src.d
-+/
+// document abstraction:
+// abstraction of sisu markup for downstream processing
+// metadoc_from_src.d
 module doc_reform.meta.metadoc_from_src;
 template docAbstraction() {
-  /+ ↓ abstraction imports +/
+  // ↓ abstraction imports
   import
     std.algorithm,
     std.container,
@@ -67,11 +65,11 @@ template docAbstraction() {
     doc_reform.meta.rgx,
     doc_reform.meta.metadoc_object_setter,
     doc_reform.meta.rgx;
-  /+ ↓ abstraction mixins +/
+  // ↓ abstraction mixins
   mixin ObjectSetter;
   mixin InternalMarkup;
   mixin spineRgxIn;
-  /+ ↓ abstraction struct init +/
+  // ↓ abstraction struct init
   @safe static auto eN() {
     struct _e {
       enum bi {
@@ -124,7 +122,7 @@ template docAbstraction() {
     }
     return _e();
   }
-  /+ initialize +/
+  // initialize
   ObjGenericComposite[] the_document_toc_section, the_document_head_section, the_document_body_section, the_document_bibliography_section, the_document_glossary_section, the_document_blurb_section, the_document_xml_dom_tail_section;
   struct _theDoc {
     ObjGenericComposite[] toc;
@@ -145,7 +143,7 @@ template docAbstraction() {
   string lev_anchor_tag;
   string[string][string] tag_assoc;
   string[] lv0to3_tags;
-  /+ enum +/
+  // enum
   enum DocStructMarkupHeading {
     h_sect_A,
     h_sect_B,
@@ -160,26 +158,26 @@ template docAbstraction() {
   } // header section A-D; header text 1-4
   enum Status { off, on, }
   enum OCNtype { ocn, non, bkidx, }
-  /+ biblio variables +/
+  // biblio variables
   string biblio_tag_name, biblio_tag_entry, st;
   string[] biblio_arr_json;
   string biblio_entry_str_json;
   JSONValue[] bib_arr_json;
   int bib_entry;
-  /+ counters +/
+  // counters
   int cntr, previous_count, previous_length;
   bool reset_note_numbers = true;
   int[string] line_occur;
   int html_segnames_ptr = 0;
   int html_segnames_ptr_cntr = 0;
   int verse_line, heading_ptr;
-  /+ paragraph attributes +/
+  // paragraph attributes
   int[string] indent;
   bool bullet = true;
   string content_non_header = "8";
   static auto obj_im = ObjInlineMarkup();
   static auto obj_att = ObjAttributes();
-  /+ ocn +/
+  // ocn
   struct OCNset {
     int digit;
     int object_number;
@@ -309,9 +307,7 @@ template docAbstraction() {
         }
       }
     }
-    debug(dom_magic_numbers) {
-      writeln("marked up: ", lev, ": ", dom);
-    }
+    debug(dom_magic_numbers) { writeln("marked up: ", lev, ": ", dom); }
     obj.metainfo.dom_structure_markedup_tags_status = dom.dup;
     return obj;
   }
@@ -353,9 +349,7 @@ template docAbstraction() {
         }
       }
     }
-    debug(dom_magic_numbers) {
-      writeln("collapsed: ", lev, ": ", dom);
-    }
+    debug(dom_magic_numbers) { writeln("collapsed: ", lev, ": ", dom); }
     obj.metainfo.dom_structure_collapsed_tags_status = dom.dup;
     return obj;
   }
@@ -413,10 +407,10 @@ template docAbstraction() {
     }
     return obj_txt;
   }
-  /+ book index variables +/
+  // book index variables
   string book_idx_tmp;
   string[][string][string] bookindex_unordered_hashes;
-  /+ node +/
+  // node
   ObjGenericComposite comp_obj_heading, comp_obj_location, comp_obj_block, comp_obj_code, comp_obj_poem_ocn, comp_obj_comment;
   auto node_construct = NodeStructureMetadata();
   enum sObj { content, anchor_tag, notes_reg, notes_star, links, image_no_dimensions }
@@ -526,7 +520,7 @@ template docAbstraction() {
     bool               _new_doc
   ) {
     static auto rgx = RgxI();
-    /+ ↓ abstraction init +/
+    // ↓ abstraction init
     scope(success) {
     }
     scope(failure) {
@@ -667,7 +661,7 @@ template docAbstraction() {
     string[][string] lev4_subtoc;
     string[][string] segnames = ["html": ["toc"], "epub": ["toc"]];
     int cnt1 = 1; int cnt2 = 1; int cnt3 = 1;
-    /+ abstraction init ↑ +/
+    // abstraction init ↑
     enum Substitute { match, markup, }
     debug (substitutions) {
       writeln(__LINE__, ":", __FILE__, ": DEBUG substitutions:");
@@ -709,9 +703,9 @@ template docAbstraction() {
       _loopMarkupSrcByLineStruct ret;
       srcDocLoopLineByLine_:
       foreach (line; markup_sourcefile_content) {
-        /+ ↓ markup document/text line by line +/
+        // ↓ markup document/text line by line
         // "line" variable can be empty but should never be null
-        /+ scope +/
+        // scope
         scope(exit) { }
         scope(failure) {
           stderr.writefln(
@@ -721,17 +715,13 @@ template docAbstraction() {
             manifested.src.filename, line,
           );
         }
-        debug(source) {
-          writeln(line);
-        }
-        debug(srclines) {
-          if (!line.empty) { writefln("* %s", line); }
-        }
+        debug(source) { writeln(line); }
+        debug(srclines) { if (!line.empty) { writefln("* %s", line); } }
         if (!line.empty) { pith = line._check_ocn_status_(pith); }
         if ( pith["block_is"] == eN.blk_is.code
           && pith["block_state"] == eN.blk_state.on
         ) {
-          /+ block object: code +/
+          // block object: code
           {
             auto _get = line.txt_by_line_block_code(an_object, pith);
             an_object = _get.this_object;
@@ -739,9 +729,9 @@ template docAbstraction() {
           }
           continue;
         } else if (!matchFirst(line, rgx.skip_from_regular_parse)) {
-          /+ object other than "code block" object +/
-          /+ (includes regular text paragraph, headings & blocks other than code) +/
-          /+ heading, glossary, blurb, poem, group, block, quote, table +/
+          // object other than "code block" object
+          // (includes regular text paragraph, headings & blocks other than code)
+          // heading, glossary, blurb, poem, group, block, quote, table
           line = line.inline_markup_faces; // by text line (rather than by text object), linebreaks in para problematic
           if (line.matchFirst(rgx.heading_biblio)
           || (pith["section"] == eN.sect.bibliography
@@ -774,11 +764,8 @@ template docAbstraction() {
             && (!(line.matchFirst(rgx.heading)))
             && (!(line.matchFirst(rgx.comment)))))
           ) {
-            /+ within section (block object): glossary +/
-            debug(glossary) {
-              writeln(__LINE__);
-              writeln(line);
-            }
+            // within section (block object): glossary
+            debug(glossary) { writeln(__LINE__); writeln(line); }
             pith["section"] = eN.sect.glossary;
             if (opt_action.backmatter && opt_action.section_glossary) {
               indent = [
@@ -880,10 +867,7 @@ template docAbstraction() {
             && (!(line.matchFirst(rgx.comment)))))
           ) {
             pith["section"] = eN.sect.blurb;
-            debug(blurb) {
-              writeln(__LINE__);
-              writeln(line);
-            }
+            debug(blurb) { writeln(__LINE__); writeln(line); }
             if (opt_action.backmatter && opt_action.section_blurb) {
               indent = [
                 "hang_position" : 0,
@@ -891,28 +875,20 @@ template docAbstraction() {
               ];
               bullet = false;
               if (auto m = line.matchFirst(rgx.para_indent)) {
-                debug(paraindent) {
-                  writeln(line);
-                }
+                debug(paraindent) { writeln(line); }
                 indent["hang_position"] = (m["indent"]).to!int;
                 indent["base_position"] = (m["indent"]).to!int;
               } else if (line.matchFirst(rgx.para_bullet)) {
-                debug(parabullet) {
-                  writeln(line);
-                }
+                debug(parabullet) { writeln(line); }
                 bullet = true;
               } else if (auto m = line.matchFirst(rgx.para_indent_hang)) {
-                debug(paraindenthang) {
-                  writeln(line);
-                }
+                debug(paraindenthang) { writeln(line); }
                 indent = [
                   "hang_position" : (m["hang"]).to!int,
                   "base_position" : (m["indent"]).to!int,
                 ];
               } else if (auto m = line.matchFirst(rgx.para_bullet_indent)) {
-                debug(parabulletindent) {
-                  writeln(line);
-                }
+                debug(parabulletindent) { writeln(line); }
                 indent = [
                   "hang_position" : (m["indent"]).to!int,
                   "base_position" : (m["indent"]).to!int,
@@ -1093,7 +1069,7 @@ template docAbstraction() {
               continue;
             }
           } else {
-            /+ not within a block group +/
+            // not within a block group
             assert(
               (pith["block_state"] == eN.blk_state.off)
               || (pith["block_state"] == eN.blk_state.closing),
@@ -1101,7 +1077,7 @@ template docAbstraction() {
             );
             if (line.matchFirst(rgx.block_open)) {
               if (line.matchFirst(rgx.block_poem_open)) {
-                /+ poem to verse exceptions! +/
+                // poem to verse exceptions!
                 object_reset(an_object);
                 processing.remove("verse");
                 object_number_poem["start"] = obj_cite_digits.object_number.to!string;
@@ -1116,7 +1092,7 @@ template docAbstraction() {
               }
               continue;
             } else if (!line.empty) {
-              /+ line not empty - non blocks (headings, paragraphs) & closed blocks +/
+              // line not empty - non blocks (headings, paragraphs) & closed blocks
               assert(
                 !line.empty,
                 "line tested, line not empty surely:\n  \"" ~ line ~ "\""
@@ -1127,10 +1103,7 @@ template docAbstraction() {
                 "code block status: none or closed"
               );
               if (pith["block_state"] == eN.blk_state.closing) {
-                debug(check) {
-                  writeln(__LINE__);
-                  writeln(line);
-                }
+                debug(check) { writeln(__LINE__); writeln(line); }
                 assert(
                   line.matchFirst(rgx.book_index_item)
                   || line.matchFirst(rgx.book_index_item_open)
@@ -1142,7 +1115,7 @@ template docAbstraction() {
               if (line.matchFirst(rgx.book_index_item)
               || line.matchFirst(rgx.book_index_item_open)
               || pith["section"] == eN.sect.book_index)  {
-                /+ book_index +/
+                // book_index
                 {
                   auto _get = line.flow_book_index_(an_object, book_idx_tmp, pith, opt_action);
                   {
@@ -1152,13 +1125,11 @@ template docAbstraction() {
                   }
                 }
               } else {
-                /+ not book_index +/
+                // not book_index
                 an_object_key = "body_nugget";
                 if (auto m = line.matchFirst(rgx.comment)) {
-                  /+ matched comment +/
-                  debug(comment) {
-                    writeln(line);
-                  }
+                  // matched comment
+                  debug(comment) { writeln(line); }
                   an_object[an_object_key]                ~= line ~= "\n";
                   comp_obj_comment                        = comp_obj_comment.init;
                   comp_obj_comment.metainfo.is_of_part    = "comment"; // breaks flow
@@ -1180,10 +1151,10 @@ template docAbstraction() {
                 } else if ((line_occur["para"] == eN.bi.off
                   && line_occur["heading"] == eN.bi.off)
                   && pith["txt_is"] == eN.txt_is.off
-                ) {                             /+ heading or para but neither flag nor line exists +/
+                ) { // heading or para but neither flag nor line exists
                   if ((conf_make_meta.make.headings.length > 2)
                   && (pith["make_headings"] == eN.bi.off)) {
-                    /+ heading found +/
+                    // heading found
                     {
                       auto _get = line.flow_heading_found_(heading_match_str, conf_make_meta.make.headings, heading_match_rgx, pith);
                       {
@@ -1198,7 +1169,7 @@ template docAbstraction() {
                     && line_occur["heading"] == eN.bi.off)
                     && pith["txt_is"] == eN.txt_is.off
                   ) {
-                    /+ heading make set +/
+                    // heading make set
                     {
                       auto _get = line.flow_heading_make_set_(line_occur, heading_match_rgx, pith);
                       {
@@ -1208,14 +1179,13 @@ template docAbstraction() {
                       }
                     }
                   }
-                  /+ TODO node info: all headings identified at this point,
-                     - extract node info here??
-                     - how long can it wait?
-                     - should be incorporated in composite objects
-                     - should happen before endnote links set (they need to be moved down?)
-                  +/
+                  // TODO node info: all headings identified at this point,
+                  // - extract node info here??
+                  // - how long can it wait?
+                  // - should be incorporated in composite objects
+                  // - should happen before endnote links set (they need to be moved down?)
                   if (line.matchFirst(rgx.headings)) {
-                    /+ heading match +/
+                    // heading match
                     line = line._doc_header_and_make_substitutions_(conf_make_meta);
                     {
                       auto _get = line.flow_heading_matched_(
@@ -1233,7 +1203,7 @@ template docAbstraction() {
                       }
                     }
                   } else if (line_occur["para"] == eN.bi.off) {
-                    /+ para match +/
+                    // para match
                     an_object_key = "body_nugget";
                     line = line
                       ._doc_header_and_make_substitutions_(conf_make_meta)
@@ -1251,17 +1221,13 @@ template docAbstraction() {
                     }
                   }
                 } else if (line_occur["heading"] > eN.bi.off) {
-                  /+ heading +/
-                  debug(heading) {
-                    writeln(line);
-                  }
+                  // heading
+                  debug(heading) { writeln(line); }
                   an_object[an_object_key] ~= line ~= "\n";
                   ++line_occur["heading"];
                 } else if (line_occur["para"] > eN.bi.off) {
-                  /+ paragraph +/
-                  debug(para) {
-                    writeln(an_object_key, "-> ", line);
-                  }
+                  // paragraph
+                  debug(para) { writeln(an_object_key, "-> ", line); }
                   line = line
                     ._doc_header_and_make_substitutions_(conf_make_meta)
                     ._doc_header_and_make_substitutions_fontface_(conf_make_meta);
@@ -1270,7 +1236,7 @@ template docAbstraction() {
                 }
               }
             } else if (pith["block_state"] == eN.blk_state.closing) {
-              /+ line empty, with blocks flag +/
+              // line empty, with blocks flag
               {
                 auto _get = line.flow_block_flag_line_empty_(
                   an_object,
@@ -1296,7 +1262,7 @@ template docAbstraction() {
                 }
               }
             } else {
-              /+ line.empty, post contents, empty variables: +/
+              // line.empty, post contents, empty variables:
               assert(
                 line.empty,
                 "\nline should be empty:\n  \""
@@ -1314,7 +1280,7 @@ template docAbstraction() {
               if (pith["txt_is"] == eN.txt_is.heading
                 && line_occur["heading"] > eN.bi.off
               ) {
-                /+ heading object (current line empty) +/
+                // heading object (current line empty)
                 obj_cite_digits = (an_object["lev_markup_number"].to!int == 0)
                 ? ocn_emit(eN.ocn.reset)
                 : ocn_emit(pith["ocn"]);
@@ -1341,7 +1307,7 @@ template docAbstraction() {
                   tag_assoc[anchor_tag]["seg_lv4"]    = tag_in_seg["seg_lv4"];
                   tag_assoc[anchor_tag]["seg_lv1to4"] = tag_in_seg["seg_lv1to4"];
                   if (lv0to3_tags.length > 0) {
-                    /+ names used for html markup segments 1 to 4 (rather than epub which has separate segments for A to D) +/
+                    // names used for html markup segments 1 to 4 (rather than epub which has separate segments for A to D)
                     foreach (lv0_to_lv3_html_tag; lv0to3_tags) {
                       tag_assoc[lv0_to_lv3_html_tag]["seg_lv4"] = anchor_tag;
                     }
@@ -1357,7 +1323,7 @@ template docAbstraction() {
                 } else if (an_object["lev_markup_number"].to!int < 4) {
                   string segn;
                   switch (an_object["lev_markup_number"].to!int) {
-                  /+ names used for epub markup segments A to D +/
+                  // names used for epub markup segments A to D
                   case 0:
                     segn = "_the_title";
                     goto default;
@@ -1385,8 +1351,8 @@ template docAbstraction() {
                   = ("bookindex_nugget" in an_object) ? an_object["bookindex_nugget"] : "";
                 bookindex_unordered_hashes
                   = bookindex_extract_hash.bookindex_nugget_hash(an_object["bookindex_nugget"], obj_cite_digits, tag_in_seg);
-                /+ (incrementally build toc) table of contents here! +/
                 _anchor_tag                   = obj_cite_digits.identifier;
+                // (incrementally build toc) table of contents here!
                 {
                   auto _get = obj_im.flow_table_of_contents_gather_headings(
                     an_object,
@@ -1434,9 +1400,7 @@ template docAbstraction() {
                   writeln(tag_in_seg["seg_lv1to4"]);
                 }
                 the_document_body_section ~= comp_obj_heading;
-                debug(objectrelated1) { // check
-                  writeln(line);
-                }
+                debug(objectrelated1) { writeln(line); } // check
                 {
                   auto _get = txt_by_line_common_reset_(line_occur, an_object, pith);
                   {
@@ -1451,7 +1415,7 @@ template docAbstraction() {
                 ++cntr;
               } else if (pith["txt_is"] == eN.txt_is.para
                 && line_occur["para"] > eN.bi.off
-              ) { /+ paragraph object (current line empty) - repeated character paragraph separator +/
+              ) { // paragraph object (current line empty) - repeated character paragraph separator
                 if ((an_object[an_object_key].to!string).matchFirst(rgx.repeated_character_line_separator)) {
                   pith["ocn"] = eN.ocn.off;
                 }
@@ -1516,7 +1480,7 @@ template docAbstraction() {
             } // close else for line empty
           } // close else for not the above
         } // close after non code, other blocks or regular text
-        /+ unless (the_document_body_section.length == 0) ? +/
+        // unless (the_document_body_section.length == 0) ?
         if (the_document_body_section.length > 0) {
           if (((the_document_body_section[$-1].metainfo.is_a == "para")
             || (the_document_body_section[$-1].metainfo.is_a == "heading")
@@ -1530,7 +1494,7 @@ template docAbstraction() {
               pith["section"] = eN.sect.unset;
             }
             if (the_document_body_section[$-1].metainfo.is_a == "verse") {
-              /+ scan for endnotes for whole poem (each verse in poem) +/
+              // scan for endnotes for whole poem (each verse in poem)
               foreach (i; previous_length .. the_document_body_section.length) {
                 if (the_document_body_section[i].metainfo.is_a == "verse") {
                   if ((the_document_body_section[i].text).match(
@@ -1545,7 +1509,7 @@ template docAbstraction() {
                 }
               }
             } else {
-              /+ scan object for endnotes +/
+              // scan object for endnotes
               previous_length = the_document_body_section.length.to!int;
               if ((the_document_body_section[$-1].text).match(
                 rgx.inline_notes_al_all_note
@@ -1610,13 +1574,8 @@ template docAbstraction() {
     auto the_document_endnotes_section = en_tuple[0];
     obj_cite_digits = en_tuple[1];
     debug(endnotes) {
-      writefln("%s %s",
-        __LINE__,
-        the_document_endnotes_section.length
-      );
-      foreach (o; the_document_endnotes_section) {
-        writeln(o);
-      }
+      writefln("%s %s", __LINE__, the_document_endnotes_section.length);
+      foreach (o; the_document_endnotes_section) { writeln(o); }
     }
     if (an_object["glossary_nugget"].length == 0) {
       comp_obj_heading_                                   = comp_obj_heading_.init;
@@ -1636,11 +1595,7 @@ template docAbstraction() {
       comp_obj_heading_.metainfo.parent_lev_markup        = 0;
       the_document_glossary_section                       ~= comp_obj_heading_;
     }
-    debug(glossary) {
-      foreach (gloss; the_document_glossary_section) {
-        writeln(gloss.text);
-      }
-    }
+    debug(glossary) { foreach (gloss; the_document_glossary_section) { writeln(gloss.text); } }
     auto biblio_unsorted_incomplete = biblio_arr_json.dup;
     auto biblio = Bibliography();
     JSONValue[] biblio_ordered;
@@ -1756,11 +1711,7 @@ template docAbstraction() {
       comp_obj_heading_.metainfo.parent_lev_markup        = 0;
       the_document_bibliography_section                   ~= comp_obj_heading_;
     }
-    debug(bibliosection) {
-      foreach (o; the_document_bibliography_section) {
-        writeln(o.text);
-      }
-    }
+    debug(bibliosection) { foreach (o; the_document_bibliography_section) { writeln(o.text); } }
     auto bi = BookIndexReportSection();
     auto bi_tuple
       = bi.bookindex_build_abstraction_section(
@@ -1771,11 +1722,7 @@ template docAbstraction() {
     destroy(bookindex_unordered_hashes);
     auto the_document_bookindex_section = bi_tuple[0];
     obj_cite_digits = bi_tuple[1];
-    debug(bookindex) {
-      foreach (bi_entry; the_document_bookindex_section) {
-        writeln(bi_entry);
-      }
-    }
+    debug(bookindex) { foreach (bi_entry; the_document_bookindex_section) { writeln(bi_entry); } }
     if (an_object["blurb_nugget"].length == 0) {
       comp_obj_heading_                                   = comp_obj_heading_.init;
       comp_obj_heading_.metainfo.is_of_part               = "empty";
@@ -1796,11 +1743,7 @@ template docAbstraction() {
       comp_obj_heading_.metainfo.parent_lev_markup        = 0;
       the_document_blurb_section                          ~= comp_obj_heading_;
     }
-    debug(blurb) {
-      foreach (blurb; the_document_blurb_section) {
-        writeln(blurb.text);
-      }
-    }
+    debug(blurb) { foreach (blurb; the_document_blurb_section) { writeln(blurb.text); } }
     indent = [
       "hang_position" : 1,
       "base_position" : 1,
@@ -1888,10 +1831,7 @@ template docAbstraction() {
       the_document_toc_section                            ~= comp_obj_toc;
     }
     debug(toc) {
-      writefln(
-        "%s %s",
-        __LINE__,
-      );
+      writefln( "%s %s", __LINE__,);
       foreach (toc_linked_heading; the_document_toc_section) {
         writeln(mkup.indent_by_spaces_provided(toc_linked_heading.attrib.indent_hang), toc_linked_heading.text);
       }
@@ -1900,9 +1840,7 @@ template docAbstraction() {
     the_document_body_section = the_document_body_section[1..$];
     @safe int[] _get_ancestors_markup(O)(O obj, ref int[] _ancestors_markup) {
       if (obj.metainfo.is_a == "heading") {
-        debug(dom) {
-          writeln(obj.text);
-        }
+        debug(dom) { writeln(obj.text); }
         if (obj.metainfo.heading_lev_markup == 1) {
           _ancestors_markup = [
             _ancestors_markup[0],
@@ -1980,9 +1918,7 @@ template docAbstraction() {
         }
         _ancestors_markup[obj.metainfo.heading_lev_markup] = obj.metainfo.ocn;
       }
-      debug(ancestor_markup) {
-        writeln("marked up: ", _ancestors_markup);
-      }
+      debug(ancestor_markup) { writeln("marked up: ", _ancestors_markup); }
       return _ancestors_markup;
     }
     @safe int[] _get_ancestors_collapsed(O)(O obj, ref int[] _ancestors_collapsed) {
@@ -2064,12 +2000,10 @@ template docAbstraction() {
         }
         _ancestors_collapsed[obj.metainfo.heading_lev_collapsed] = obj.metainfo.ocn;
       }
-      debug(ancestor_collapsed) {
-        writeln("collapsed: ", _ancestors_collapsed);
-      }
+      debug(ancestor_collapsed) { writeln("collapsed: ", _ancestors_collapsed); }
       return _ancestors_collapsed;
     }
-    /+ multiple 1~ levels, loop through document body +/
+    // multiple 1~ levels, loop through document body
     if (the_document_body_section.length > 1) {
       int[] _ancestors_markup = [0,0,0,0,0,0,0,0];
       int[][] _ancestors_markup_;
@@ -2231,14 +2165,12 @@ template docAbstraction() {
         int max_width = 640;
         foreach (img; obj.text.matchAll(rgx.inline_image_without_dimensions)) {
           try {
-            read_image_info(manifested.src.image_dir_path ~ "/" ~ img["img"], w, h, chans); //
+            read_image_info(manifested.src.image_dir_path ~ "/" ~ img["img"], w, h, chans);
           } catch (Exception ex) {
             writeln("WARNING, image not found: ", img["img"], "\n  ", manifested.src.image_dir_path ~ "/" ~ img["img"]);
           }
           // calculate, decide max width and proportionally reduce to keep w & h within it
-          debug(images) {
-            writeln("width: ", w, ", height: ", h);
-          }
+          debug(images) { writeln("width: ", w, ", height: ", h); }
           if (w > max_width) {
             _w = max_width;
             _h = round((max_width / w.to!real) * h.to!real);
@@ -2257,9 +2189,7 @@ template docAbstraction() {
             )
           );
         }
-        debug(images) {
-          writeln("image without dimensions: ", obj.text);
-        }
+        debug(images) { writeln("image without dimensions: ", obj.text); }
       }
       return obj;
     }
@@ -2284,22 +2214,19 @@ template docAbstraction() {
     }
     foreach (ref obj; the_document_head_section) {
       if (obj.metainfo.is_a == "heading") {
-        debug(dom) {
-          writeln(obj.text);
-        }
+        debug(dom) { writeln(obj.text); }
         if (obj.metainfo.heading_lev_markup <= 4) {
           segnames_0_to_4 ~= obj.tags.segment_anchor_tag_epub;
         }
         if (obj.metainfo.heading_lev_markup == 0) {
-          /+ TODO second hit (of two) with same assertion failure, check, fix and reinstate
-          assert( obj.metainfo.ocn == 1,
-            "Title OCN should be 1 not: " ~ obj.metainfo.ocn.to!string); // bug introduced 0.18.1
-          +/
+          // TODO second hit (of two) with same assertion failure, check, fix and reinstate
+          // assert( obj.metainfo.ocn == 1,
+          //   "Title OCN should be 1 not: " ~ obj.metainfo.ocn.to!string); // bug introduced 0.18.1
           obj.metainfo.ocn = 1;
           obj.metainfo.identifier = "1";
           obj.metainfo.object_number_type = OCNtype.ocn;
         }
-        /+ dom structure (marked up & collapsed) +/
+        // dom structure (marked up & collapsed)
         if (opt_action.meta_processing_xml_dom) {
           obj = obj.obj_dom_structure_set_markup_tags(dom_structure_markedup_tags_status, obj.metainfo.heading_lev_markup);
           obj = obj.obj_dom_set_collapsed_tags(dom_structure_collapsed_tags_status, obj.metainfo.heading_lev_collapsed);
@@ -2309,7 +2236,7 @@ template docAbstraction() {
       obj = _links(obj);
     }
     if (the_document_toc_section.length > 1) {
-      /+ scroll +/
+      // scroll
       dom_structure_markedup_tags_status_buffer = dom_structure_markedup_tags_status.dup;
       dom_structure_collapsed_tags_status_buffer = dom_structure_collapsed_tags_status.dup;
       foreach (ref obj; the_document_toc_section) {
@@ -2322,7 +2249,7 @@ template docAbstraction() {
                 obj.tags.anchor_tag_html ~ "!=" ~ segnames["html"][obj.ptr.html_segnames]);
             }
           }
-          /+ dom structure (marked up & collapsed) +/
+          // dom structure (marked up & collapsed)
           if (opt_action.meta_processing_xml_dom) {
             obj = obj.obj_dom_structure_set_markup_tags(dom_structure_markedup_tags_status, obj.metainfo.heading_lev_markup);
             obj = obj.obj_dom_set_collapsed_tags(dom_structure_collapsed_tags_status, obj.metainfo.heading_lev_collapsed);
@@ -2332,7 +2259,7 @@ template docAbstraction() {
         obj = _links(obj);
       }
     }
-    /+ multiple 1~ levels, loop through document body +/
+    // multiple 1~ levels, loop through document body
     if (the_document_body_section.length > 1) {
       foreach (ref obj; the_document_body_section) {
         if (!(obj.metainfo.identifier.empty)) {
@@ -2346,9 +2273,7 @@ template docAbstraction() {
           = obj.tags.epub_segment_anchor_tag_is;
         }
         if (obj.metainfo.is_a == "heading") {
-          debug(dom) {
-            writeln(obj.text);
-          }
+          debug(dom) { writeln(obj.text); }
           if (obj.metainfo.heading_lev_markup <= 4) {
             segnames_0_to_4 ~= obj.tags.segment_anchor_tag_epub;
             if (obj.metainfo.heading_lev_markup == 4) {
@@ -2361,7 +2286,7 @@ template docAbstraction() {
                 obj.tags.anchor_tag_html ~ "!=" ~ segnames["html"][obj.ptr.html_segnames]);
             }
           }
-          /+ dom structure (marked up & collapsed) +/
+          // dom structure (marked up & collapsed)
           if (opt_action.meta_processing_xml_dom) {
             obj = obj.obj_dom_structure_set_markup_tags(dom_structure_markedup_tags_status, obj.metainfo.heading_lev_markup);
             obj = obj.obj_dom_set_collapsed_tags(dom_structure_collapsed_tags_status, obj.metainfo.heading_lev_collapsed);
@@ -2375,7 +2300,7 @@ template docAbstraction() {
       }
     }
     auto image_list = (_images.sort()).uniq;
-    /+ optional only one 1~ level +/
+    // optional only one 1~ level
     if (the_document_endnotes_section.length > 1) {
       dom_structure_markedup_tags_status_buffer           = dom_structure_markedup_tags_status.dup;
       dom_structure_collapsed_tags_status_buffer          = dom_structure_collapsed_tags_status.dup;
@@ -2383,9 +2308,7 @@ template docAbstraction() {
       dom_structure_collapsed_tags_status                 = dom_structure_collapsed_tags_status_buffer.dup;
       foreach (ref obj; the_document_endnotes_section) {
         if (obj.metainfo.is_a == "heading") {
-          debug(dom) {
-            writeln(obj.text);
-          }
+          debug(dom) { writeln(obj.text); }
           if (obj.metainfo.heading_lev_markup == 1) {
             obj_cite_digits                               = ocn_emit(eN.ocn.on);
             obj.metainfo.ocn                              = obj_cite_digits.object_number;
@@ -2402,7 +2325,7 @@ template docAbstraction() {
                 obj.tags.anchor_tag_html ~ "!=" ~ segnames["html"][obj.ptr.html_segnames]);
             }
           }
-          /+ dom structure (marked up & collapsed) +/
+          // dom structure (marked up & collapsed)
           if (opt_action.meta_processing_xml_dom) {
             obj = obj.obj_dom_structure_set_markup_tags(dom_structure_markedup_tags_status, obj.metainfo.heading_lev_markup);
             obj = obj.obj_dom_set_collapsed_tags(dom_structure_collapsed_tags_status, obj.metainfo.heading_lev_collapsed);
@@ -2412,13 +2335,11 @@ template docAbstraction() {
         obj = _links(obj);
       }
     }
-    /+ optional only one 1~ level +/
+    // optional only one 1~ level
     if (the_document_glossary_section.length > 1) {
       foreach (ref obj; the_document_glossary_section) {
         if (obj.metainfo.is_a == "heading") {
-          debug(dom) {
-            writeln(obj.text);
-          }
+          debug(dom) { writeln(obj.text); }
           if (obj.metainfo.heading_lev_markup == 1) {
             obj_cite_digits                               = ocn_emit(eN.ocn.on);
             obj.metainfo.ocn                              = obj_cite_digits.object_number;
@@ -2435,7 +2356,7 @@ template docAbstraction() {
                 obj.tags.anchor_tag_html ~ "!=" ~ segnames["html"][obj.ptr.html_segnames]);
             }
           }
-          /+ dom structure (marked up & collapsed) +/
+          // dom structure (marked up & collapsed)
           if (opt_action.meta_processing_xml_dom) {
             obj = obj.obj_dom_structure_set_markup_tags(dom_structure_markedup_tags_status, obj.metainfo.heading_lev_markup);
             obj = obj.obj_dom_set_collapsed_tags(dom_structure_collapsed_tags_status, obj.metainfo.heading_lev_collapsed);
@@ -2449,13 +2370,11 @@ template docAbstraction() {
         obj = _links(obj);
       }
     }
-    /+ optional only one 1~ level +/
+    // optional only one 1~ level
     if (the_document_bibliography_section.length > 1) {
       foreach (ref obj; the_document_bibliography_section) {
         if (obj.metainfo.is_a == "heading") {
-          debug(dom) {
-            writeln(obj.text);
-          }
+          debug(dom) { writeln(obj.text); }
           if (obj.metainfo.heading_lev_markup == 1) {
             obj_cite_digits                               = ocn_emit(eN.ocn.on);
             obj.metainfo.ocn                              = obj_cite_digits.object_number;
@@ -2472,7 +2391,7 @@ template docAbstraction() {
                 obj.tags.anchor_tag_html ~ "!=" ~ segnames["html"][obj.ptr.html_segnames]);
             }
           }
-          /+ dom structure (marked up & collapsed) +/
+          // dom structure (marked up & collapsed)
           if (opt_action.meta_processing_xml_dom) {
             obj = obj.obj_dom_structure_set_markup_tags(dom_structure_markedup_tags_status, obj.metainfo.heading_lev_markup);
             obj = obj.obj_dom_set_collapsed_tags(dom_structure_collapsed_tags_status, obj.metainfo.heading_lev_collapsed);
@@ -2486,17 +2405,16 @@ template docAbstraction() {
         obj = _links(obj);
       }
     }
-    /+ optional only one 1~ level +/
+    // optional only one 1~ level
     int ocn_       = obj_cite_digits.object_number;
     int ocn_bkidx_ = 0;
     int ocn_bidx_;
-    if (the_document_bookindex_section.length > 1) {                                        /+ scroll +/
+    if (the_document_bookindex_section.length > 1) {                                        // scroll
       dom_structure_markedup_tags_status_buffer = dom_structure_markedup_tags_status.dup;
       dom_structure_collapsed_tags_status_buffer = dom_structure_collapsed_tags_status.dup;
       foreach (ref obj; the_document_bookindex_section) {
         if (obj.metainfo.is_a == "heading") {
-          debug(dom) {
-          }
+          // debug(dom) { }
           if (obj.metainfo.heading_lev_markup <= 4) {
             segnames_0_to_4 ~= obj.tags.segment_anchor_tag_epub;
           }
@@ -2515,7 +2433,7 @@ template docAbstraction() {
                 obj.tags.anchor_tag_html ~ "!=" ~ segnames["html"][obj.ptr.html_segnames]);
             }
           }
-          /+ dom structure (marked up & collapsed) +/
+          // dom structure (marked up & collapsed)
           if (opt_action.meta_processing_xml_dom) {
             obj = obj.obj_dom_structure_set_markup_tags(dom_structure_markedup_tags_status, obj.metainfo.heading_lev_markup);
             obj = obj.obj_dom_set_collapsed_tags(dom_structure_collapsed_tags_status, obj.metainfo.heading_lev_collapsed);
@@ -2530,18 +2448,14 @@ template docAbstraction() {
         }
         obj = _links(obj);
       }
-      /+ TODO assert failure, reinstate
-      assert(obj_cite_digit_bkidx == ocn_bidx_
-        obj_cite_digit_bkidx ~ " == ocn_" ~ ocn_ ~ "?");
-      +/
+      // TODO assert failure, reinstate
+      // assert(obj_cite_digit_bkidx == ocn_bidx_ obj_cite_digit_bkidx ~ " == ocn_" ~ ocn_ ~ "?");
     }
-    /+ optional only one 1~ level +/
+    // optional only one 1~ level
     if (the_document_blurb_section.length > 1) {
       foreach (ref obj; the_document_blurb_section) {
         if (obj.metainfo.is_a == "heading") {
-          debug(dom) {
-            writeln(obj.text);
-          }
+          debug(dom) { writeln(obj.text); }
           if (obj.metainfo.heading_lev_markup == 1) {
             obj_cite_digits                               = ocn_emit(eN.ocn.on);
             obj.metainfo.ocn                              = obj_cite_digits.object_number;
@@ -2558,7 +2472,7 @@ template docAbstraction() {
                 obj.tags.anchor_tag_html ~ "!=" ~ segnames["html"][obj.ptr.html_segnames]);
             }
           }
-          /+ dom structure (marked up & collapsed) +/
+          // dom structure (marked up & collapsed)
           if (opt_action.meta_processing_xml_dom) {
             obj = obj.obj_dom_structure_set_markup_tags(dom_structure_markedup_tags_status, obj.metainfo.heading_lev_markup);
             obj = obj.obj_dom_set_collapsed_tags(dom_structure_collapsed_tags_status, obj.metainfo.heading_lev_collapsed);
@@ -2585,7 +2499,7 @@ template docAbstraction() {
       );
       debug(decendants_tuple) {
         pairs = pairs.sort();
-        foreach (pair; pairs) {  // (pair; pairs.sort())
+        foreach (pair; pairs) { // (pair; pairs.sort())
           writeln(pair[0], "..", pair[1]);
         }
       }
@@ -2676,12 +2590,11 @@ template docAbstraction() {
         }
       }
     }
-    /+ TODO
-      - note create/insert heading object sole purpose eof close all open tags
-        sort out:
-        - obj.metainfo.dom_structure_markedup_tags_status = dom_structure_markedup_tags_status;
-        - obj.metainfo.dom_structure_collapsed_tags_status = dom_structure_collapsed_tags_status;
-    +/
+    // TODO
+    //  - note create/insert heading object sole purpose eof close all open tags
+    //    sort out:
+    //    - obj.metainfo.dom_structure_markedup_tags_status = dom_structure_markedup_tags_status;
+    //    - obj.metainfo.dom_structure_collapsed_tags_status = dom_structure_collapsed_tags_status;
     comp_obj_heading_                                               = comp_obj_heading_.init;
     comp_obj_heading_.metainfo.is_of_part                           = "empty";
     comp_obj_heading_.metainfo.is_of_section                        = "empty";
@@ -2710,15 +2623,15 @@ template docAbstraction() {
     ObjGenericComposite[][string] document_the = [
       "head":             the_document_head_section,
       "toc":              the_document_toc_section,
-      /+ substantive/body: +/
+      // substantive/body:
       "body":             the_document_body_section,
-      /+ backmatter: +/
+      // backmatter:
       "endnotes":         the_document_endnotes_section,
       "glossary":         the_document_glossary_section,
       "bibliography":     the_document_bibliography_section,
       "bookindex":        the_document_bookindex_section,
       "blurb":            the_document_blurb_section,
-      /+ dom tail only +/
+      // dom tail only
       "tail":             the_document_xml_dom_tail_section,
     ];
     string[][string] document_section_keys_sequenced = [
@@ -2853,7 +2766,7 @@ template docAbstraction() {
       ret.doc_has      = doc_has;
     }
     return ret;
-  }                                                                             /+ ← closed: abstract doc source +/
+  } // ← closed: abstract doc source
   @system retStruct_txt_by_line_common_reset txt_by_line_common_reset_()(
     int[string]     line_occur,
     string[string]  an_object,
@@ -2883,12 +2796,7 @@ template docAbstraction() {
       an_object["lang"]               = "";
       an_object["attrib"]             = (m["attrib"]) ? m["attrib"].to!string : "";
       an_object["syntax"]             = (m["syntax"]) ? m["syntax"].to!string : "";
-      debug(codecurly) {                              // code (curly) open
-        writefln(
-          "* [code curly] %s",
-          line
-        );
-      }
+      debug(codecurly) { writefln( "* [code curly] %s", line); }                              // code (curly) open
       pith["block_is"]                = eN.blk_is.code;
       pith["block_state"]             = eN.blk_state.on;
       pith["block_delim"]             = eN.blk_delim.curly;
@@ -2897,12 +2805,7 @@ template docAbstraction() {
       an_object["syntax"]             = "";
       an_object["attrib"]             = (m["attrib"]) ? m["attrib"].to!string : "";
       an_object["lang"]               = (m["lang"]) ? m["lang"].to!string : "";
-      debug(poem) {                              // poem (curly) open
-        writefln(
-          "* [poem curly] %s",
-          line
-        );
-      }
+      debug(poem) { writefln( "* [poem curly] %s", line); }                              // poem (curly) open
       object_number_poem["start"]     = obj_cite_digits.object_number.to!string;
       pith["block_is"]                = eN.blk_is.poem;
       pith["block_state"]             = eN.blk_state.on;
@@ -2913,12 +2816,7 @@ template docAbstraction() {
       an_object["syntax"]             = "";
       an_object["attrib"]             = (m["attrib"]) ? m["attrib"].to!string : "";
       an_object["lang"]               = (m["lang"]) ? m["lang"].to!string : "";
-      debug(group) {                             // group (curly) open
-        writefln(
-          "* [group curly] %s",
-          line
-        );
-      }
+      debug(group) { writefln( "* [group curly] %s", line); }                             // group (curly) open
       pith["block_is"]                = eN.blk_is.group;
       pith["block_state"]             = eN.blk_state.on;
       pith["block_delim"]             = eN.blk_delim.curly;
@@ -2927,12 +2825,7 @@ template docAbstraction() {
       an_object["syntax"]             = "";
       an_object["attrib"]             = (m["attrib"]) ? m["attrib"].to!string : "";
       an_object["lang"]               = (m["lang"]) ? m["lang"].to!string : "";
-      debug(block) {
-        writefln(
-          "* [block curly] %s",
-          line
-        );
-      }
+      debug(block) { writefln( "* [block curly] %s", line); }
       pith["block_is"]                = eN.blk_is.block;
       pith["block_state"]             = eN.blk_state.on;
       pith["block_delim"]             = eN.blk_delim.curly;
@@ -2941,29 +2834,19 @@ template docAbstraction() {
       an_object["syntax"]             = "";
       an_object["attrib"]             = m["attrib"].to!string;
       an_object["lang"]               = m["lang"].to!string;
-      debug(quote) {
-        writefln(
-          "* [quote curly] %s",
-          line
-        );
-      }
+      debug(quote) { writefln( "* [quote curly] %s", line); }
       pith["block_is"]                = eN.blk_is.quote;
       pith["block_state"]             = eN.blk_state.on;
       pith["block_delim"]             = eN.blk_delim.curly;
-    } else if (auto m = line.matchFirst(rgx.block_curly_table_open)) {           /+ curly table open +/
-      debug(table) {                             // table (curly) open
-        writefln(
-          "* [table curly] %s",
-          line
-        );
-      }
+    } else if (auto m = line.matchFirst(rgx.block_curly_table_open)) {           // curly table open
+      debug(table) { writefln( "* [table curly] %s", line); }
       dochas["table"] ++;
       an_object["table_head"]         = m["attrib"].to!string;
       an_object["block_type"]         = "curly";
       pith["block_is"]                = eN.blk_is.table;
       pith["block_state"]             = eN.blk_state.on;
       pith["block_delim"]             = eN.blk_delim.curly;
-    } else if (auto m = line.matchFirst(rgx.block_curly_table_special_markup)) { /+ table: special table block markup syntax! +/
+    } else if (auto m = line.matchFirst(rgx.block_curly_table_special_markup)) { // table: special table block markup syntax!
       dochas["table"]++;
       an_object["table_head"]         = m["attrib"].to!string;
       an_object["block_type"]         = "special";
@@ -2975,12 +2858,7 @@ template docAbstraction() {
       an_object["lang"]               = "";
       an_object["attrib"]             = (m["attrib"]) ? m["attrib"].to!string : "";
       an_object["syntax"]             = (m["syntax"]) ? m["syntax"].to!string : "";
-      debug(codetic) {
-        writefln(
-          "* [code tic] %s",
-          line
-        );
-      }
+      debug(codetic) { writefln( "* [code tic] %s", line); }
       pith["block_is"]                = eN.blk_is.code;
       pith["block_state"]             = eN.blk_state.on;
       pith["block_delim"]             = eN.blk_delim.tic;
@@ -2989,12 +2867,7 @@ template docAbstraction() {
       an_object["syntax"]             = "";
       an_object["attrib"]             = (m["attrib"]) ? m["attrib"].to!string : "";
       an_object["lang"]               = (m["lang"]) ? m["lang"].to!string : "";
-      debug(poem) {
-        writefln(
-          "* [poem tic] %s",
-          line
-        );
-      }
+      debug(poem) { writefln( "* [poem tic] %s", line); }
       object_number_poem["start"]     = obj_cite_digits.object_number.to!string;
       pith["block_is"]                = eN.blk_is.poem;
       pith["block_state"]             = eN.blk_state.on;
@@ -3005,12 +2878,7 @@ template docAbstraction() {
       an_object["syntax"]             = "";
       an_object["attrib"]             = (m["attrib"]) ? m["attrib"].to!string : "";
       an_object["lang"]               = (m["lang"]) ? m["lang"].to!string : "";
-      debug(group) {
-        writefln(
-          "* [group tic] %s",
-          line
-        );
-      }
+      debug(group) { writefln( "* [group tic] %s", line); }
       pith["block_is"]                = eN.blk_is.group;
       pith["block_state"]             = eN.blk_state.on;
       pith["block_delim"]             = eN.blk_delim.tic;
@@ -3019,12 +2887,7 @@ template docAbstraction() {
       an_object["syntax"]             = "";
       an_object["attrib"]             = (m["attrib"]) ? m["attrib"].to!string : "";
       an_object["lang"]               = (m["lang"]) ? m["lang"].to!string : "";
-      debug(block) {
-        writefln(
-          "* [block tic] %s",
-          line
-        );
-      }
+      debug(block) { writefln( "* [block tic] %s", line); }
       pith["block_is"]                = eN.blk_is.block;
       pith["block_state"]             = eN.blk_state.on;
       pith["block_delim"]             = eN.blk_delim.tic;
@@ -3033,22 +2896,13 @@ template docAbstraction() {
       an_object["syntax"]             = "";
       an_object["attrib"]             = m["attrib"].to!string;
       an_object["lang"]               = m["lang"].to!string;
-      debug(quote) {                             // quote (tic) open
-        writefln(
-          "* [quote tic] %s",
-          line
-        );
+      debug(quote) { writefln( "* [quote tic] %s", line);                        // quote (tic) open
       }
       pith["block_is"]                = eN.blk_is.quote;
       pith["block_state"]             = eN.blk_state.on;
       pith["block_delim"]             = eN.blk_delim.tic;
-    } else if (auto m = line.matchFirst(rgx.block_tic_table_open)) {             /+ tic table open +/
-      debug(table) {                             // table (tic) open
-        writefln(
-          "* [table tic] %s",
-          line
-        );
-      }
+    } else if (auto m = line.matchFirst(rgx.block_tic_table_open)) {             // tic table open
+      debug(table) { writefln( "* [table tic] %s", line); }
       dochas["table"] ++;
       an_object["table_head"]         = m["attrib"].to!string;
       an_object["block_type"]         = "tic";
@@ -3073,32 +2927,24 @@ template docAbstraction() {
     if (pith["block_is"] == eN.blk_is.quote){
       if (pith["block_delim"] == eN.blk_delim.curly) {
         if (line.matchFirst(rgx.block_curly_quote_close)) {
-          debug(quote) {
-            writeln(line);
-          }
+          debug(quote) { writeln(line); }
           an_object[an_object_key]    = an_object[an_object_key].stripRight;
           pith["block_is"]            = eN.blk_is.quote;
           pith["block_state"]         = eN.blk_state.closing;
           pith["block_delim"]         = eN.blk_delim.off;
         } else {
-          debug(quote) {
-            writeln(line);
-          }
+          debug(quote) { writeln(line); }
           an_object[an_object_key] ~= line ~= "\n";
         }
       } else if (pith["block_delim"] == eN.blk_delim.tic) {
         if (line.matchFirst(rgx.block_tic_close)) {
-          debug(quote) {
-            writeln(line);
-          }
+          debug(quote) { writeln(line); }
           an_object[an_object_key]    = an_object[an_object_key].stripRight;
           pith["block_is"]            = eN.blk_is.quote;
           pith["block_state"]         = eN.blk_state.closing;
           pith["block_delim"]         = eN.blk_delim.off;
         } else {
-          debug(quote) {
-            writeln(line);
-          }
+          debug(quote) { writeln(line); }
           an_object[an_object_key] ~= line ~= "\n";
         }
       }
@@ -3119,32 +2965,24 @@ template docAbstraction() {
     if (pith["block_is"] == eN.blk_is.group) {
       if (pith["block_delim"] == eN.blk_delim.curly) {
         if (line.matchFirst(rgx.block_curly_group_close)) {
-          debug(group) {
-            writeln(line);
-          }
+          debug(group) { writeln(line); }
           an_object[an_object_key]    = an_object[an_object_key].stripRight;
           pith["block_is"]            = eN.blk_is.group;
           pith["block_state"]         = eN.blk_state.closing;
           pith["block_delim"]         = eN.blk_delim.off;
         } else {
-          debug(group) {
-            writeln(line);
-          }
+          debug(group) { writeln(line); }
           an_object[an_object_key] ~= line ~= "\n";
         }
       } else if (pith["block_delim"] == eN.blk_delim.tic) {
         if (line.matchFirst(rgx.block_tic_close)) {
-          debug(group) {
-            writeln(line);
-          }
+          debug(group) { writeln(line); }
           an_object[an_object_key]    = an_object[an_object_key].stripRight;
           pith["block_is"]            = eN.blk_is.group;
           pith["block_state"]         = eN.blk_state.closing;
           pith["block_delim"]         = eN.blk_delim.off;
         } else {
-          debug(group) {
-            writeln(line);
-          }
+          debug(group) { writeln(line); }
           an_object[an_object_key] ~= line ~= "\n";
         }
       }
@@ -3165,32 +3003,24 @@ template docAbstraction() {
     if (pith["block_is"] == eN.blk_is.block) {
       if (pith["block_delim"] == eN.blk_delim.curly) {
         if (line.matchFirst(rgx.block_curly_block_close)) {
-          debug(block) {
-            writeln(line);
-          }
+          debug(block) { writeln(line); }
           an_object[an_object_key]    = an_object[an_object_key].stripRight;
           pith["block_is"]            = eN.blk_is.block;
           pith["block_state"]         = eN.blk_state.closing;
           pith["block_delim"]         = eN.blk_delim.off;
         } else {
-          debug(block) {
-            writeln(line);
-          }
+          debug(block) { writeln(line); }
           an_object[an_object_key] ~= line ~= "\n";
         }
       } else if (pith["block_delim"] == eN.blk_delim.tic) {
         if (line.matchFirst(rgx.block_tic_close)) {
-          debug(block) {
-            writeln(line);
-          }
+          debug(block) { writeln(line); }
           an_object[an_object_key]    = an_object[an_object_key].stripRight;
           pith["block_is"]            = eN.blk_is.block;
           pith["block_state"]         = eN.blk_state.closing;
           pith["block_delim"]         = eN.blk_delim.off;
         } else {
-          debug(block) {
-            writeln(line);
-          }
+          debug(block) { writeln(line); }
           an_object[an_object_key] ~= line ~= "\n";
         }
       }
@@ -3218,30 +3048,16 @@ template docAbstraction() {
           if (an_object_key in an_object
           || processing.length > 0) {
             an_object[an_object_key]        = "";
-            debug(poem) {
-              writefln(
-                "* [poem curly] %s",
-                line
-              );
-            }
+            debug(poem) { writefln( "* [poem curly] %s", line); }
             if (processing.length > 0) {
               an_object[an_object_key]      = processing["verse"];
             }
             debug(poem) {
               writeln(__LINE__);
-              writefln(
-                "* %s %s",
-                obj_cite_digits.object_number,
-                line
-              );
+              writefln( "* %s %s", obj_cite_digits.object_number, line);
             }
             if (an_object.length > 0) {
-              debug(poem) {
-                writeln(
-                  obj_cite_digits.object_number,
-                  an_object[an_object_key]
-                );
-              }
+              debug(poem) { writeln( obj_cite_digits.object_number, an_object[an_object_key]); }
               an_object["is"]                                   = "verse";
               TxtAndAnchorTagPlusHasFootnotesUrlsImages substantive_obj_misc_tuple
                 = obj_im.obj_inline_markup_and_anchor_tags_and_misc(an_object, an_object_key, conf_make_meta, No._new_doc);
@@ -3287,8 +3103,7 @@ template docAbstraction() {
           if (pith["verse_new"] == eN.bi.on) {
             verse_line = 1;
             an_object[an_object_key]  = processing["verse"];
-            debug(poem) {
-              writefln(
+            debug(poem) { writefln(
                 "* %s curly\n%s",
                 obj_cite_digits.object_number,
                 an_object[an_object_key]
@@ -3336,20 +3151,12 @@ template docAbstraction() {
       } else if (pith["block_delim"] == eN.blk_delim.tic) {
         if (auto m = line.matchFirst(rgx.block_tic_close)) {
           an_object[an_object_key] = "verse";
-          debug(poem) {
-            writefln(
-              "* [poem tic] %s",
-              line
-            );
-          }
+          debug(poem) { writefln( "* [poem tic] %s", line); }
           if (processing.length > 0) {
             an_object[an_object_key]  = processing["verse"];
           }
           if (an_object.length > 0) {
-            debug(poem) {
-              writeln(__LINE__);
-              writeln(obj_cite_digits.object_number, line);
-            }
+            debug(poem) { writeln(__LINE__); writeln(obj_cite_digits.object_number, line); }
             processing.remove("verse");
             an_object["is"]                                     = "verse";
             TxtAndAnchorTagPlusHasFootnotesUrlsImages substantive_obj_misc_tuple
@@ -3395,8 +3202,7 @@ template docAbstraction() {
           if (pith["verse_new"] == eN.bi.on) {
             verse_line = 1;
             an_object[an_object_key]  = processing["verse"];
-            debug(poem) {
-              writefln(
+            debug(poem) { writefln(
                 "* %s tic\n%s",
                 obj_cite_digits.object_number,
                 an_object[an_object_key]
@@ -3461,9 +3267,7 @@ template docAbstraction() {
     if ( pith["block_is"] == eN.blk_is.code) {
       if (pith["block_delim"] == eN.blk_delim.curly) {
         if (line.matchFirst(rgx.block_curly_code_close)) {
-          debug(codecurly) {
-            writeln(line);
-          }
+          debug(codecurly) { writeln(line); }
           an_object[an_object_key] = an_object[an_object_key]
             .replaceFirst(rgx.newline_eol_delimiter_only, "")
             .stripRight;
@@ -3471,16 +3275,12 @@ template docAbstraction() {
           pith["block_state"]         = eN.blk_state.closing;
           pith["block_delim"]         = eN.blk_delim.off;
         } else {
-          debug(codecurly) {
-            writeln(line);
-          }
+          debug(codecurly) { writeln(line); }
           an_object[an_object_key] ~= line ~= "\n";
         }
       } else if (pith["block_delim"] == eN.blk_delim.tic) {
         if (line.matchFirst(rgx.block_tic_close)) {
-          debug(codetic) {
-            writeln(line);
-          }
+          debug(codetic) { writeln(line); }
           an_object[an_object_key] = an_object[an_object_key]
             .replaceFirst(rgx.newline_eol_delimiter_only, "")
             .stripRight;
@@ -3488,9 +3288,7 @@ template docAbstraction() {
           pith["block_state"]         = eN.blk_state.closing;
           pith["block_delim"]         = eN.blk_delim.off;
         } else {
-          debug(codetic) {
-            writeln(line);
-          }
+          debug(codetic) { writeln(line); }
           an_object[an_object_key] ~= line ~= "\n";
         }
       }
@@ -3512,16 +3310,12 @@ template docAbstraction() {
     if (pith["block_is"] == eN.blk_is.table) {
       if (pith["block_delim"] == eN.blk_delim.curly) {
         if (line.matchFirst(rgx.block_curly_table_close)) {
-          debug(table) {
-            writeln(line);
-          }
+          debug(table) { writeln(line); }
           pith["block_is"]            = eN.blk_is.table;
           pith["block_state"]         = eN.blk_state.closing;
           pith["block_delim"]         = eN.blk_delim.off;
         } else {
-          debug(table) {
-            writeln(line);
-          }
+          debug(table) { writeln(line); }
           an_object[an_object_key] ~= line ~= "\n";
         }
       } else if (pith["block_delim"] == eN.blk_delim.curly_special) {
@@ -3549,23 +3343,17 @@ template docAbstraction() {
             }
           }
         } else {
-          debug(table) {
-            writeln(line);
-          }
+          debug(table) { writeln(line); }
           an_object[an_object_key] ~= line ~= "\n";
         }
       } else if (pith["block_delim"] == eN.blk_delim.tic) {
         if (line.matchFirst(rgx.block_tic_close)) {
-          debug(table) {
-            writeln(line);
-          }
+          debug(table) { writeln(line); }
           pith["block_is"]            = eN.blk_is.table;
           pith["block_state"]         = eN.blk_state.closing;
           pith["block_delim"]         = eN.blk_delim.off;
         } else {
-          debug(table) {
-            writeln(line);
-          }
+          debug(table) { writeln(line); }
           an_object[an_object_key] ~= line ~= "\n";
         }
       }
@@ -3617,12 +3405,8 @@ template docAbstraction() {
     }
     if (line.empty) {
       debug {
-        debug(biblioblock) {
-          writeln("---");
-        }
-        debug(biblioblockinclude) {
-          writeln(biblio_entry_str_json.length);
-        }
+        debug(biblioblock) { writeln("---"); }
+        debug(biblioblockinclude) { writeln(biblio_entry_str_json.length); }
       }
       if ((bib_entry == eN.bi.off)
       && (biblio_entry_str_json.empty)) {
@@ -3646,9 +3430,7 @@ template docAbstraction() {
         biblio_entry_str_json = "";
       }
     } else if (line.matchFirst(rgx.biblio_tags)) {
-      debug(biblioblock) {
-        writeln(line);
-      }
+      debug(biblioblock) { writeln(line); }
       auto bt = line.match(rgx.biblio_tags);
       bib_entry = eN.bi.off;
       st = bt.captures[1].to!string;
@@ -3658,10 +3440,7 @@ template docAbstraction() {
         ? (biblio_tag_map(st))
         : st;
       j.object[biblio_tag_name] = header_tag_value;
-      debug(bibliounsortedcheckduplicates) {
-        writeln(biblio_tag_name, ": ", header_tag_value);
-        writeln("--");
-      }
+      debug(bibliounsortedcheckduplicates) { writeln(biblio_tag_name, ": ", header_tag_value); writeln("--"); }
       switch (biblio_tag_name) {
       case "author_raw": // author_arr author (fn sn)
         j["author_arr"]
@@ -3699,8 +3478,7 @@ template docAbstraction() {
         break;
       }
       auto s = j.toString();
-      debug(biblio1) {
-        writefln(
+      debug(biblio1) { writefln(
           "* %s: %s\n%s",
           biblio_tag_name,
           biblio_tag_entry,
@@ -3712,9 +3490,7 @@ template docAbstraction() {
         writeln("ERROR", s, "%%");
       }
       if (!(match(line, rgx.comment))) {
-        debug(biblioblockinclude) {
-          writeln(line);
-        }
+        debug(biblioblockinclude) { writeln(line); }
         biblio_entry_str_json = s;
       } else {
         biblio_entry_str_json = "";
@@ -3730,7 +3506,7 @@ template docAbstraction() {
     }
     return ret;
   }
-                                                                                /+ ↓ abstraction functions +/
+  // ↓ abstraction functions
   @safe static string[string] object_reset()(string[string] an_object) {
     an_object.remove("body_nugget");
     an_object.remove("substantive");
@@ -3746,22 +3522,18 @@ template docAbstraction() {
     static auto rgx = RgxI();
     if (!(line.empty)) {
       if (pith["no_ocn_multiple_objects"] == eN.bi.off) {
-        /+ not multi-line object, check whether object_number is on or turned off +/
-        if (line.matchFirst(rgx.object_number_block_marks)) {                      /+ switch off object_number +/
+        // not multi-line object, check whether object_number is on or turned off
+        if (line.matchFirst(rgx.object_number_block_marks)) {                      // switch off object_number
           if (line.matchFirst(rgx.object_number_off_block)) {
             pith["no_ocn_multiple_objects"]             = eN.bi.on;
             pith["ocn"]                                 = eN.ocn.off;
-            debug(ocnoff) {
-              writeln(line);
-            }
+            debug(ocnoff) { writeln(line); }
           }
           if (line.matchFirst(rgx.object_number_off_block_dummy_heading)) {
             pith["no_ocn_multiple_objects"]             = eN.bi.on;
             pith["dummy_heading_multiple_objects"]      = eN.bi.on;
             pith["ocn"]                                 = eN.ocn.off;
-            debug(ocnoff) {
-              writeln(line);
-            }
+            debug(ocnoff) { writeln(line); }
           }
         } else if (pith["no_ocn_multiple_objects"] == eN.bi.off) {
             pith["dummy_heading_status"]                = eN.bi.off;
@@ -3785,9 +3557,7 @@ template docAbstraction() {
           pith["no_ocn_multiple_objects"]               = eN.bi.off;
           pith["ocn"]                                   = eN.ocn.on;
           pith["dummy_heading_status"]                  = eN.bi.off;
-          debug(ocnoff) {
-            writeln(line);
-          }
+          debug(ocnoff) { writeln(line); }
         }
       }
     }
@@ -4230,37 +4000,26 @@ template docAbstraction() {
     B               opt_action,
   ) {
     static auto rgx = RgxI();
-    if (auto m = line.match(rgx.book_index_item)) {                                   /+ match book_index +/
-      debug(bookindexmatch) {
-        writefln(
+    if (auto m = line.match(rgx.book_index_item)) {                                   // match book_index
+      debug(bookindexmatch) { writefln(
           "* [bookindex] %s\n",
           m["bookindex"].to!string,
         );
       }
       an_object["bookindex_nugget"] = m.captures[1].to!string;
-    } else if (auto m = line.match(rgx.book_index_item_open))  {                      /+ match open book_index +/
+    } else if (auto m = line.match(rgx.book_index_item_open))  {                      // match open book_index
       pith["section"] = eN.sect.book_index;
       if (opt_action.backmatter && opt_action.section_bookindex) {
         book_idx_tmp = m.captures[1].to!string;
-        debug(bookindexmatch) {
-          writefln(
-            "* [bookindex] %s\n",
-            book_idx_tmp,
-          );
-        }
+        debug(bookindexmatch) { writefln( "* [bookindex] %s\n", book_idx_tmp,); }
       }
-    } else if (pith["section"] == eN.sect.book_index)  {                    /+ book_index flag set +/
+    } else if (pith["section"] == eN.sect.book_index)  {                    // book_index flag set
       if (auto m = line.match(rgx.book_index_item_close))  {
         pith["section"] = eN.sect.unset;
         if (opt_action.backmatter
         && opt_action.section_bookindex) {
           an_object["bookindex_nugget"] = book_idx_tmp ~ m.captures[1].to!string;
-          debug(bookindexmatch) {
-            writefln(
-              "* [bookindex] %s\n",
-              book_idx_tmp,
-            );
-          }
+          debug(bookindexmatch) { writefln( "* [bookindex] %s\n", book_idx_tmp,); }
         }
         book_idx_tmp = "";
       } else {
@@ -4287,10 +4046,8 @@ template docAbstraction() {
   ) {
     static auto rgx = RgxI();
     if ((_make_unmarked_headings.length > 2)
-    && (pith["make_headings"] == eN.bi.off)) {                        /+ headings found +/
-      debug(headingsfound) {
-        writeln(_make_unmarked_headings);
-      }
+    && (pith["make_headings"] == eN.bi.off)) {                        // headings found
+      debug(headingsfound) { writeln(_make_unmarked_headings); }
       debug(headingsfound) {
         writeln(_make_unmarked_headings.length);
         writeln(_make_unmarked_headings);
@@ -4375,48 +4132,34 @@ template docAbstraction() {
       && (line_occur["para"] == eN.bi.off
       && line_occur["heading"] == eN.bi.off)
       && pith["txt_is"] == eN.txt_is.off
-    ) {                             /+ heading make set +/
+    ) {                             // heading make set
       if (line.matchFirst(heading_match_rgx["h_B"])) {
         line = "B~ " ~ line;
-        debug(headingsfound) {
-          writeln(line);
-        }
+        debug(headingsfound) { writeln(line); }
       }
       if (line.matchFirst(heading_match_rgx["h_C"])) {
         line = "C~ " ~ line;
-        debug(headingsfound) {
-          writeln(line);
-        }
+        debug(headingsfound) { writeln(line); }
       }
       if (line.matchFirst(heading_match_rgx["h_D"])) {
         line = "D~ " ~ line;
-        debug(headingsfound) {
-          writeln(line);
-        }
+        debug(headingsfound) { writeln(line); }
       }
       if (line.matchFirst(heading_match_rgx["h_1"])) {
         line = "1~ " ~ line;
-        debug(headingsfound) {
-          writeln(line);
-        }
+        debug(headingsfound) { writeln(line); }
       }
       if (line.matchFirst(heading_match_rgx["h_2"])) {
         line = "2~ " ~ line;
-        debug(headingsfound) {
-          writeln(line);
-        }
+        debug(headingsfound) { writeln(line); }
       }
       if (line.matchFirst(heading_match_rgx["h_3"])) {
         line = "3~ " ~ line;
-        debug(headingsfound) {
-          writeln(line);
-        }
+        debug(headingsfound) { writeln(line); }
       }
       if (line.matchFirst(heading_match_rgx["h_4"])) {
         line = "4~ " ~ line;
-        debug(headingsfound) {
-          writeln(line);
-        }
+        debug(headingsfound) { writeln(line); }
       }
     }
     retStruct_flow_heading_make_set ret;
@@ -4439,7 +4182,7 @@ template docAbstraction() {
   ) {
     static auto rgx = RgxI();
     static auto mkup = InlineMarkup();
-    if (auto m = line.match(rgx.headings)) {                                      /+ heading match +/
+    if (auto m = line.match(rgx.headings)) {                                      // heading match
       ++line_occur["heading"];
       pith["txt_is"]           = eN.txt_is.heading;
       if (line.match(rgx.heading_seg_and_above)) {
@@ -4593,9 +4336,7 @@ template docAbstraction() {
         an_object["lev_markup_number"] = lv["lv"].to!string;
       }
       an_object["dummy_heading_status"] = (pith["dummy_heading_status"] == eN.bi.off) ? "f" : "t";
-      debug(heading) {
-        writeln(line.strip);
-      }
+      debug(heading) { writeln(line.strip); }
     }
     struct retStruct_flow_heading_matched {
       string[string]  this_object;
@@ -4630,7 +4371,7 @@ template docAbstraction() {
     static auto rgx = RgxI();
     if (line_occur["para"] == eN.bi.off) {
       line = font_faces_line(line);
-      /+ para matches +/
+      // para matches
       pith["txt_is"]           = eN.txt_is.para;
       an_object[an_object_key] ~= line;
       indent = [
@@ -4639,28 +4380,20 @@ template docAbstraction() {
       ];
       bullet = false;
       if (auto m = line.matchFirst(rgx.para_indent)) {
-        debug(paraindent) {
-          writeln(line);
-        }
+        debug(paraindent) { writeln(line); }
         indent["hang_position"] = (m["indent"]).to!int;
         indent["base_position"] = (m["indent"]).to!int;
       } else if (line.matchFirst(rgx.para_bullet)) {
-        debug(parabullet) {
-          writeln(line);
-        }
+        debug(parabullet) { writeln(line); }
         bullet = true;
       } else if (auto m = line.matchFirst(rgx.para_indent_hang)) {
-        debug(paraindenthang) {
-          writeln(line);
-        }
+        debug(paraindenthang) { writeln(line); }
         indent = [
           "hang_position" : (m["hang"]).to!int,
           "base_position" : (m["indent"]).to!int,
         ];
       } else if (auto m = line.matchFirst(rgx.para_bullet_indent)) {
-        debug(parabulletindent) {
-          writeln(line);
-        }
+        debug(parabulletindent) { writeln(line); }
         indent = [
           "hang_position" : (m["indent"]).to!int,
           "base_position" : (m["indent"]).to!int,
@@ -4738,9 +4471,7 @@ template docAbstraction() {
     ulong col_num_;
     ulong col_num_chk = 0;
     foreach(idx_r, row; table_array) {
-      debug(table_dev) {
-        writeln("row ", idx_r);
-      }
+      debug(table_dev) { writeln("row ", idx_r); }
       col_num_ = 0;
       if (col_num == 0
       || col_num < row.length) {
@@ -4749,19 +4480,13 @@ template docAbstraction() {
       if (col_num_chk == 0) {
         col_num_chk = col_num;
       } else if (col_num == 1) {
-        debug(table_dev) {
-          writeln("table note: ");
-        }
+        debug(table_dev) { writeln("table note: "); }
       } else if (col_num_chk != col_num) {
-        debug(table_dev) {
-          writeln("warning irregular number of columns: ", col_num_chk, " != ", col_num);
-        }
+        debug(table_dev) { writeln("warning irregular number of columns: ", col_num_chk, " != ", col_num); }
       } else {
       }
       foreach(idx_c, col; row) {
-        debug(table_dev) {
-          write(idx_c, ", ");
-        }
+        debug(table_dev) { write(idx_c, ", "); }
         col_num_ = idx_c;
         _table_substantive ~= col ~ mng.tc_s;
         if (idx_r == 0 && table_object.table.heading) {
@@ -4785,9 +4510,7 @@ template docAbstraction() {
           }
         }
       }
-      debug(table_dev) {
-        writeln("");
-      }
+      debug(table_dev) { writeln(""); }
       if (col_num_chk > 0 && (col_num != col_num_chk)) {
       } else if (col_num == col_num_chk){
       } else {
@@ -4799,9 +4522,7 @@ template docAbstraction() {
       if (table_object.table.number_of_columns == 0) {
         table_object.table.number_of_columns = (col_num).to!int;
       } else {
-        debug(table_dev) {
-          writeln(table_object.table.number_of_columns, " != ", col_num);
-        }
+        debug(table_dev) { writeln(table_object.table.number_of_columns, " != ", col_num); }
       }
     }
     if (table_object.table.number_of_columns == 0
@@ -4816,9 +4537,7 @@ template docAbstraction() {
       }
     } else if (table_object.table.number_of_columns
     != table_object.table.column_widths.length) {
-      debug(table_dev) {
-        writeln(m.hit); // further logic required
-      }
+      debug(table_dev) { writeln(m.hit); } // further logic required
       if (table_object.table.number_of_columns > table_object.table.column_widths.length) {
         double col_w = (100.00 - (table_object.table.column_widths).sum)
           / (table_object.table.number_of_columns - table_object.table.column_widths.length);
@@ -4908,8 +4627,8 @@ template docAbstraction() {
     }
     return ret;
   }
-  /+ abstraction functions ↑ +/
-  /+ ↓ abstraction function emitters +/
+  // abstraction functions ↑
+  // ↓ abstraction function emitters
   @safe pure struct OCNemitter {
     int ocn_digit, ocn_object_number, ocn_on_, ocn_off_, ocn_bkidx, ocn_bkidx_;
     string object_identifier;
@@ -4958,7 +4677,6 @@ template docAbstraction() {
     invariant() {
     }
   }
-                                                                                /+ +/
   @safe static struct ObjInlineMarkupMunge {
     string[string] obj_txt;
     int n_foot, n_foot_reg, n_foot_sp_asterisk, n_foot_sp_plus;
@@ -4975,36 +4693,30 @@ template docAbstraction() {
     }
     @safe static auto images()(string obj_txt_in) {
       static auto mng = InlineMarkup();
-      /+ url matched +/
+      // url matched
       obj_txt_in = obj_txt_in.replaceAll(rgx.inline_notes_al_special, ""); // TODO reinstate when special footnotes are implemented
-      if (obj_txt_in.match(rgx.smid_image_generic)) {                            /+ images with and without links +/
-        debug(images) {
-          writeln("Image: ", obj_txt_in);
-        }
+      if (obj_txt_in.match(rgx.smid_image_generic)) {                            // images with and without links
+        debug(images) { writeln("Image: ", obj_txt_in); }
         if (obj_txt_in.match(rgx.smid_image_with_dimensions)) {
           obj_txt_in = obj_txt_in
             .replaceAll(rgx.smid_image_with_dimensions, ("$1" ~ mkup.img ~ "$2,w$3h$4 " ~ "$5"))
             .replaceAll(rgx.smid_image_delimit, ("$1"
               ~ mkup.lnk_o ~ "$2".strip ~ mkup.lnk_c
               ~ mkup.url_o ~ mkup.url_c));
-          debug(images) {
-            writeln("IMAGE with size: ", obj_txt_in);
-          }
+          debug(images) { writeln("IMAGE with size: ", obj_txt_in); }
         } else if (obj_txt_in.match(rgx.smid_image)) {
           obj_txt_in = obj_txt_in
             .replaceAll(rgx.smid_image, ("$1" ~ mkup.img ~ "$2,w0h0" ~ "$3"))
             .replaceAll(rgx.smid_image_delimit, ("$1"
               ~ mkup.lnk_o ~ "$2".strip ~ mkup.lnk_c
               ~ mkup.url_o ~ mkup.url_c));
-          debug(images) {
-            writeln("IMAGE: ", obj_txt_in); // decide on representation
-          }
+          debug(images) { writeln("IMAGE: ", obj_txt_in); } // decide on representation
         }
       }
       return obj_txt_in;
     }
     @safe TxtPlusHasFootnotes footnotes_endnotes_markup_and_number_or_stars()(string obj_txt_in, bool reset_note_numbers) {
-      /+ endnotes (regular) +/
+      // endnotes (regular)
       bool flg_notes_reg  = false;
       bool flg_notes_star = false;
       bool flg_notes_plus = false;
@@ -5082,7 +4794,7 @@ template docAbstraction() {
       bool urls = false;
       bool images_without_dimensions = false;
       tail = "";
-      /+ special endnotes +/
+      // special endnotes
       obj_txt_in = obj_txt_in.replaceAll(
         rgx.inline_notes_curly_sp_asterisk,
         (mkup.en_a_o ~ "*" ~ " $1" ~ mkup.en_a_c)
@@ -5092,14 +4804,14 @@ template docAbstraction() {
           rgx.inline_notes_curly_sp_plus,
           (mkup.en_a_o ~ "+" ~ " $1" ~ mkup.en_a_c)
         );
-      /+ image matched +/
+      // image matched
       if (obj_txt_in.match(rgx.smid_image_generic)) {
         obj_txt_in = images(obj_txt_in);
         if (obj_txt_in.match(rgx.smid_mod_image_without_dimensions)) {
           images_without_dimensions = true;
         }
       }
-      /+ url matched +/
+      // url matched
       if (obj_txt_in.match(rgx.smid_inline_url)) {
         urls = true;
         obj_txt_in = obj_txt_in.links_and_images;
@@ -5110,13 +4822,10 @@ template docAbstraction() {
       }
       TxtPlusHasFootnotes ftn = footnotes_endnotes_markup_and_number_or_stars(obj_txt_in, reset_note_numbers);
       obj_txt_out = ftn.obj_txt;
-      debug(footnotes) {
-        writeln(obj_txt_out, tail);
-      }
+      debug(footnotes) { writeln(obj_txt_out, tail); }
       obj_txt_out = obj_txt_out ~ tail;
       debug(footnotesdone) {
-        foreach(m; matchAll(obj_txt_out,
-        (mkup.en_a_o ~ `\s*(.+?)` ~ mkup.en_a_c))) {
+        foreach(m; matchAll(obj_txt_out, (mkup.en_a_o ~ `\s*(.+?)` ~ mkup.en_a_c))) {
           writeln(m[1]);
           writeln(m.hit);
         }
@@ -5437,8 +5146,8 @@ template docAbstraction() {
           heading_num[3]                    = 0;
           heading_number_auto_composite     = "";
         }
-        /+ auto_num_depth minimum 0
-           (1.) default 2 (1.1.1) max 3 (1.1.1.1) implement +/
+        // auto_num_depth minimum 0
+        // (1.) default 2 (1.1.1) max 3 (1.1.1.1) implement
         if (
           conf_make_meta.make.auto_num_top_lv
           > obj_["lev_markup_number"].to!uint
@@ -5547,9 +5256,7 @@ template docAbstraction() {
           (heading_number_auto_composite.empty)
             ? ""
             : "seg_" ~ heading_number_auto_composite;
-        debug(heading_number_auto) {
-          writeln(heading_number_auto_composite);
-        }
+        debug(heading_number_auto) { writeln(heading_number_auto_composite); }
         if ((!empty(heading_number_auto_composite))
         && (obj_["lev_markup_number"].to!uint >= conf_make_meta.make.auto_num_top_lv)) {
           munge_ = munge_
@@ -5596,7 +5303,6 @@ template docAbstraction() {
       return munge_;
     }
   }
-                                                                                /+ +/
   struct ObjAttributes {
     string[string] _obj_attrib;
     @safe string obj_attributes()(
@@ -5780,7 +5486,6 @@ template docAbstraction() {
       return _obj_attrib;
     }
   }
-                                                                                /+ +/
   struct BookIndexNuggetHash {
     string main_term, sub_term, sub_term_bits;
     int object_number_offset, object_number_endpoint;
@@ -5792,9 +5497,7 @@ template docAbstraction() {
       OCNset obj_cite_digits,
       S      tag_in_seg,
     ) {
-      debug(asserts) {
-        static assert(is(typeof(obj_cite_digits.object_number) == int));
-      }
+      debug(asserts) { static assert(is(typeof(obj_cite_digits.object_number) == int)); }
       debug(bookindexraw) {
         if (!bookindex_section.empty) {
           writeln(
@@ -5863,9 +5566,7 @@ template docAbstraction() {
       auto mainkeys
         = bookindex_unordered_hashes.byKey.array.sort().release;
       foreach (mainkey; mainkeys) {
-        debug(bookindex1) {
-          writeln(mainkey);
-        }
+        debug(bookindex1) { writeln(mainkey); }
         auto subkeys
           = bookindex_unordered_hashes[mainkey].byKey.array.sort().release;
         foreach (subkey; subkeys) {
@@ -5919,9 +5620,7 @@ template docAbstraction() {
       OCNset                   obj_cite_digits,
       B                        opt_action,
     ) {
-      debug(asserts) {
-        static assert(is(typeof(obj_cite_digits.object_number)             == int));
-      }
+      debug(asserts) { static assert(is(typeof(obj_cite_digits.object_number) == int)); }
       mixin spineNode;
       mixin InternalMarkup;
       static auto mkup = InlineMarkup();
@@ -6072,7 +5771,6 @@ template docAbstraction() {
       return t;
     }
   }
-                                                                                /+ +/
   struct NotesSection {
     string[string] object_notes;
     int previous_count;
@@ -6102,8 +5800,7 @@ template docAbstraction() {
         (contents_am[cntr].text).matchAll(
           rgx.inline_notes_al_special_char_note)
       ) {
-        debug(endnotes_build) {
-          writeln(
+        debug(endnotes_build) { writeln(
             "{", mkup.ff_i, mkup.superscript, mkup.ff_o, m["char"], ".", mkup.ff_c, mkup.superscript, "}"
             ~ mkup.mark_internal_site_lnk,
             tag_in_seg["seg_lv4"],
@@ -6131,8 +5828,7 @@ template docAbstraction() {
         (contents_am[cntr].text).matchAll(
           rgx.inline_notes_al_regular_number_note)
       ) {
-        debug(endnotes_build) {
-          writeln(
+        debug(endnotes_build) { writeln(
             "{", mkup.ff_i, mkup.superscipt, mkup.ff_o, m["num"], ".", mkup.ff_c, mkup.superscipt, "}"
             ~ mkup.mark_internal_site_lnk,
             tag_in_seg["seg_lv4"],
@@ -6280,7 +5976,6 @@ template docAbstraction() {
       return t;
     }
   }
-                                                                                /+ +/
   struct Bibliography {
     @system public retStruct_flow_bibliography flow_bibliography_()(
       string[]    biblio_unsorted_incomplete,
@@ -6318,10 +6013,9 @@ template docAbstraction() {
       JSONValue[]   bib_arr_json
     ) {
       foreach (bibent; biblio_unordered) {
-        /+ update bib to include deemed_author, needed for:
-          sort_bibliography_array_by_deemed_author_year_title
-          either: sort on multiple fields, or; create such sort field
-        +/
+        // update bib to include deemed_author, needed for:
+        // sort_bibliography_array_by_deemed_author_year_title
+        // either: sort on multiple fields, or; create such sort field
         JSONValue j = parseJSON(bibent);
         if (!empty(j["fulltitle"].str)) {
           if (!empty(j["author_raw"].str)) {
@@ -6349,9 +6043,7 @@ template docAbstraction() {
         })(biblio_unordered).array;
       debug(bibliosorted) {
         foreach (j; biblio_sorted_) {
-          if (!empty(j["fulltitle"].str)) {
-            writeln(j["sortby_deemed_author_year_title"]);
-          }
+          if (!empty(j["fulltitle"].str)) { writeln(j["sortby_deemed_author_year_title"]); }
         }
       }
       return biblio_sorted_;
@@ -6359,14 +6051,11 @@ template docAbstraction() {
     @system void biblio_debug()(JSONValue[] biblio_sorted) {
       debug(biblio0) {
         foreach (j; biblio_sorted) {
-          if (!empty(j["fulltitle"].str)) {
-            writeln(j["sortby_deemed_author_year_title"]);
-          }
+          if (!empty(j["fulltitle"].str)) { writeln(j["sortby_deemed_author_year_title"]); }
         }
       }
     }
   }
-                                                                                /+ +/
   struct NodeStructureMetadata {
     int lv, lv0, lv1, lv2, lv3, lv4, lv5, lv6, lv7;
     int obj_cite_digit;
@@ -6382,9 +6071,7 @@ template docAbstraction() {
       int            ptr_,
       string         is_
     ) {
-      debug(asserts) {
-        static assert(is(typeof(obj_cite_digits.object_number) == int));
-      }
+      debug(asserts) { static assert(is(typeof(obj_cite_digits.object_number) == int)); }
       assert(is_ != "heading");
       assert(obj_cite_digits.object_number.to!int >= 0);
       assert(is_ != "heading");                          // should not be necessary
@@ -6413,11 +6100,8 @@ template docAbstraction() {
       comp_obj_location.metainfo.parent_ocn           = p_["object_number"];
       comp_obj_location.metainfo.parent_lev_markup    = p_["lev_markup_number"];
       debug(_node) {
-        if (lev_markup_number.match(rgx.levels_numbered_headings)) {
-          writeln("x ", _node.to!string);
-        } else {
-          writeln("- ", _node.to!string);
-        }
+        if (lev_markup_number.match(rgx.levels_numbered_headings)) { writeln("x ", _node.to!string);
+        } else { writeln("- ", _node.to!string); }
       }
       assert(comp_obj_location.metainfo.parent_lev_markup >= 4);
       assert(comp_obj_location.metainfo.parent_lev_markup <= 7);
@@ -6456,14 +6140,13 @@ template docAbstraction() {
       );
       if (lev_markup_number.match(rgx.levels_numbered)) {
         if (lev_markup_number.to!int == 0) {
-          /+ TODO first hit (of two) with this assertion failure, check, fix & reinstate
-          assert(obj_cite_digits.object_number.to!int == 1,
-            "ERROR header lev markup number is: " ~
-            lev_markup_number.to!string ~
-            " obj_cite_digits.object_number.to!int should == 1 but is: " ~
-             obj_cite_digits.object_number.to!string ~
-            "\n" ~ _text);
-          +/
+          // TODO first hit (of two) with this assertion failure, check, fix & reinstate
+          // assert(obj_cite_digits.object_number.to!int == 1,
+          //   "ERROR header lev markup number is: " ~
+          //   lev_markup_number.to!string ~
+          //   " obj_cite_digits.object_number.to!int should == 1 but is: " ~
+          //    obj_cite_digits.object_number.to!string ~
+          //   "\n" ~ _text);
         }
       }
       switch (lev_markup_number.to!int) {
@@ -6579,14 +6262,10 @@ template docAbstraction() {
       tag_assoc[_comp_obj_heading_.tags.anchor_tag_html]["seg_lv4"]            = _comp_obj_heading_.tags.in_segment_html;
       tag_assoc[_comp_obj_heading_.tags.segment_anchor_tag_epub]["seg_lv1to4"] = _comp_obj_heading_.tags.segment_anchor_tag_epub;
       debug(_node) {
-        if (lev_markup_number.match(rgx.levels_numbered_headings)) {
-          writeln("* ", _node.to!string);
-        }
+        if (lev_markup_number.match(rgx.levels_numbered_headings)) { writeln("* ", _node.to!string); }
       }
       debug(nodeheading) {
-        if (lev_markup_number.match(rgx.levels_numbered_headings)) {
-          writeln("* ", _node.to!string);
-        }
+        if (lev_markup_number.match(rgx.levels_numbered_headings)) { writeln("* ", _node.to!string); }
       }
       assert(_comp_obj_heading_.metainfo.parent_lev_markup <= 7);
       assert(_comp_obj_heading_.metainfo.parent_ocn >= 0);
@@ -6623,8 +6302,8 @@ template docAbstraction() {
     invariant() {
     }
   }
-                                                                                /+ abstraction functions emitters ↑ +/
-                                                                                /+ ↓ abstraction functions assertions +/
+  // abstraction functions emitters ↑
+  // ↓ abstraction functions assertions
   @safe pure void assertions_doc_structure()(
     string[string]  an_object,
     string          an_object_key,
@@ -7195,7 +6874,7 @@ template docAbstraction() {
       break;
     }
   }
-  /+ abstraction functions assertions ↑ +/
+  // abstraction functions assertions ↑
 }
 template docSectKeysSeq() {
   @safe auto docSectKeysSeq(string[][string] document_section_keys_sequenced) {