Added comments about where markdown content came from

The HTML files now include a comment indicating from where the main
part of the markdown content.

Changed `bin/gen-other-html.sh` VERSION from "1.0 2024-02-27"
to "1.0.1 2024-03-08".

Changed `bin/gen-top-html.sh` VERSION from "1.2 2024-02-29"
to "1.2.1 2024-03-08".

Changed `bin/gen-year-index.sh` VERSION from "1.0.1 2024-02-23"
to "1.0.2 2024-03-08".

Changed `bin/md2html.sh` VERSION from "1.0.1 2024-02-23"
to "1.1 2024-03-08".

Changed `bin/quick-readme2index.sh` VERSION from "1.1.1 2024-02-23"
to "1.1.2 2024-03-08".

1991/index.html

@@ -11,6 +11,7 @@
 <!-- END: this line ends content from: inc/top.default.html -->
 <!-- -->
 <!-- The original markdown content was formed by the tool: unspecified -->
+<!-- The main part of the markdown content came from: 1991/README.md -->
 <!-- The HTML was converted from markdown by the tool: bin/md2html.sh -->
 <!-- -->
 <!-- START: this line starts content from: inc/head.default.html -->
@@ -124,8 +125,8 @@ details.</p>
 possible that on BSD or non-Unix systems the Makefile needs to be
 changed.</p>
 <p>This year, we did not single out an entry that was better than all of
-the rest. We selected 3 entries that were, in our opinion, went beyond
-all of the other entries this year:</p>
+the rest. We selected 3 entries that, in our opinion, went beyond all of
+the other entries this year:</p>
 <ul>
 <li><a href="westley/index.html">Grand Prize</a> by <a
 href="../authors.html#Brian_Westley">Brian Westley</a></li>