improved indentation and whitespace for markdown code blocks

All code blocks in markdown have been intended by at least 4 spaces.

We add `--tab-stop=8` to all `pandoc(1)` executions in order to set
a better tab stop indentation, especially for tab intended code blocks.

Changed `bin/pandoc-wrapper.sh` VERSION from "1.5.3 2024-03-26"
to "1.6 2024-03-31".

Fixed `1991/brnstnd/sorta.README.md` so that the sorta code
is code blocks.

Removed unneeded paragraph group in copyright in `inc/footer.default.html`.

Fixed excess whitespace after list Author on entry `index.html` page.

Changed `bin/output-index-author.sh` VERSION from "1.5.2 2024-03-26"
to "1.6 2024-03-31".

Performed `make www` to perform the above and test under macOS.

TODO: Fix the problem of the initial line of code being extra intended.
TODO: Fix excess whitespace around code that is inline.

2004/anonymous/README.md

@@ -1,14 +1,14 @@
 ## To build:
 
 ```sh
-make
+    make
 ```
 
 
 ## To use:
 
 ```sh
-./anonymous 'foo' > bar.pgm
+    ./anonymous 'foo' > bar.pgm
 ```
 
 Now open the output using your favourite
@@ -22,7 +22,7 @@ images.
 ## Try:
 
 ```sh
-./try.sh
+    ./try.sh
 ```
 
 NOTE: technically the text is supposed to be in all lower case but the script
@@ -108,8 +108,8 @@ inscription](https://www.glyphweb.com/arda/r/ringinscription.html) to
 the file `ring.pgm`:
 
 ```sh
-./anonymous "ash nazg durhbatuluhk, ash nazg gimbatul, \
-    ash nazg thrakatuluhk, agh burzhumh-ishi krimpatul." >ring.pgm
+    ./anonymous "ash nazg durhbatuluhk, ash nazg gimbatul, \
+	ash nazg thrakatuluhk, agh burzhumh-ishi krimpatul." >ring.pgm
 ```
 
 The source code assumes the ASCII character set; also, due to space

2004/anonymous/index.html

@@ -132,8 +132,7 @@
 <h2 id="author"><a name="author"></a>Author:</h2>
 <ul>
 <li>Name: <a href="../../authors.html#Anonymous_2004">Anonymous 2004</a><br>
-Location: <a href="../../location.html#SG">SG</a> - <em>Republic of Singapore</em> (<em>Singapore</em>)
-<br><br></li>
+Location: <a href="../../location.html#SG">SG</a> - <em>Republic of Singapore</em> (<em>Singapore</em>)</li>
 </ul>
 
 <!-- END: next line ends content generated by: bin/output-index-author.sh -->
@@ -142,9 +141,9 @@ Location: <a href="../../location.html#SG">SG</a> - <em>Republic of Singapore</e
 <!-- START: this line starts content for HTML phase 21 by: bin/pandoc-wrapper.sh via bin/md2html.sh -->
 
 <h2 id="to-build">To build:</h2>
-<div class="sourceCode" id="cb1"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb1-1"><a href="#cb1-1" aria-hidden="true" tabindex="-1"></a><span class="fu">make</span></span></code></pre></div>
+<div class="sourceCode" id="cb1"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb1-1"><a href="#cb1-1" aria-hidden="true" tabindex="-1"></a>    <span class="fu">make</span></span></code></pre></div>
 <h2 id="to-use">To use:</h2>
-<div class="sourceCode" id="cb2"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb2-1"><a href="#cb2-1" aria-hidden="true" tabindex="-1"></a><span class="ex">./anonymous</span> <span class="st">&#39;foo&#39;</span> <span class="op">&gt;</span> bar.pgm</span></code></pre></div>
+<div class="sourceCode" id="cb2"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb2-1"><a href="#cb2-1" aria-hidden="true" tabindex="-1"></a>    <span class="ex">./anonymous</span> <span class="st">&#39;foo&#39;</span> <span class="op">&gt;</span> bar.pgm</span></code></pre></div>
 <p>Now open the output using your favourite
 <a href="https://en.wikipedia.org/wiki/Netpbm#PGM_example">pgm</a> viewer. If you don’t
 have a <code>pgm</code> viewer then we suggest the <a href="https://netpbm.sourceforge.net">netpbm
@@ -152,7 +151,7 @@ toolkit</a> to convert the image to a graphics
 format that you can view. Most graphical web browsers can display PNG or JPEG
 images.</p>
 <h2 id="try">Try:</h2>
-<div class="sourceCode" id="cb3"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb3-1"><a href="#cb3-1" aria-hidden="true" tabindex="-1"></a><span class="ex">./try.sh</span></span></code></pre></div>
+<div class="sourceCode" id="cb3"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb3-1"><a href="#cb3-1" aria-hidden="true" tabindex="-1"></a>    <span class="ex">./try.sh</span></span></code></pre></div>
 <p>NOTE: technically the text is supposed to be in all lower case but the script
 does use some upper case letters for demonstration purposes.</p>
 <h2 id="judges-remarks">Judges’ remarks:</h2>
@@ -221,8 +220,8 @@ in lower case.</p>
 <p>The following command thus writes a rendering of the <a href="https://www.glyphweb.com/arda/r/ringinscription.html">Ring
 inscription</a> to
 the file <code>ring.pgm</code>:</p>
-<div class="sourceCode" id="cb4"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb4-1"><a href="#cb4-1" aria-hidden="true" tabindex="-1"></a><span class="ex">./anonymous</span> <span class="st">&quot;ash nazg durhbatuluhk, ash nazg gimbatul, </span><span class="dt">\</span></span>
-<span id="cb4-2"><a href="#cb4-2" aria-hidden="true" tabindex="-1"></a><span class="st">    ash nazg thrakatuluhk, agh burzhumh-ishi krimpatul.&quot;</span> <span class="op">&gt;</span>ring.pgm</span></code></pre></div>
+<div class="sourceCode" id="cb4"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb4-1"><a href="#cb4-1" aria-hidden="true" tabindex="-1"></a>    <span class="ex">./anonymous</span> <span class="st">&quot;ash nazg durhbatuluhk, ash nazg gimbatul, </span><span class="dt">\</span></span>
+<span id="cb4-2"><a href="#cb4-2" aria-hidden="true" tabindex="-1"></a><span class="st">        ash nazg thrakatuluhk, agh burzhumh-ishi krimpatul.&quot;</span> <span class="op">&gt;</span>ring.pgm</span></code></pre></div>
 <p>The source code assumes the ASCII character set; also, due to space
 constraints, the program uses rather inefficient algorithms, so it may
 waste a lot of time and space even when rendering moderately long