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/gavare/index.html

@@ -132,8 +132,7 @@
 <h2 id="author"><a name="author"></a>Author:</h2>
 <ul>
 <li>Name: <a href="../../authors.html#Anders_Gavare">Anders Gavare</a><br>
-Location: <a href="../../location.html#SE">SE</a> - <em>Kingdom of Sweden</em> (<em>Sweden</em>)
-<br><br></li>
+Location: <a href="../../location.html#SE">SE</a> - <em>Kingdom of Sweden</em> (<em>Sweden</em>)</li>
 </ul>
 
 <!-- END: next line ends content generated by: bin/output-index-author.sh -->
@@ -142,18 +141,18 @@ Location: <a href="../../location.html#SE">SE</a> - <em>Kingdom of Sweden</em> (
 <!-- 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>
 <p>There are three alternate versions; see <a href="#alternate-code">alternate code</a> below
 for more details.</p>
 <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">./gavare</span> <span class="op">&gt;</span> ioccc_ray.ppm</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">./gavare</span> <span class="op">&gt;</span> ioccc_ray.ppm</span></code></pre></div>
 <p>Open <code>ioccc_ray.ppm</code> with a viewer capable of viewing PPM files. Alternatively,
 if you have ImageMagick installed, you can convert it to a jpeg:</p>
-<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">convert</span> ioccc_ray.ppm ioccc_ray.jpg</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">convert</span> ioccc_ray.ppm ioccc_ray.jpg</span></code></pre></div>
 <p>and then view <code>ioccc_ray.jpg</code> in a graphics viewer, editor or web browser.</p>
 <h2 id="try">Try:</h2>
 <p>If you have <code>xv(1)</code> you can do:</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">./gavare</span> <span class="kw">|</span> <span class="ex">xv</span> <span class="at">-</span></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">./gavare</span> <span class="kw">|</span> <span class="ex">xv</span> <span class="at">-</span></span></code></pre></div>
 <p>to not worry about writing it to a file and just viewing the image it creates.</p>
 <h2 id="alternate-code">Alternate code:</h2>
 <p>The alt code <a href="gavare.alt.c">gavare.alt.c</a> allows you to change the size of the
@@ -166,18 +165,18 @@ was used during development, which we have included in the file
 on <code>stdout</code> which theoretically should work in Windows.</p>
 <h3 id="alternate-build">Alternate build:</h3>
 <p>To build the configurable and unobfuscated versions:</p>
-<div class="sourceCode" id="cb5"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb5-1"><a href="#cb5-1" aria-hidden="true" tabindex="-1"></a><span class="fu">make</span> alt</span></code></pre></div>
+<div class="sourceCode" id="cb5"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb5-1"><a href="#cb5-1" aria-hidden="true" tabindex="-1"></a>    <span class="fu">make</span> alt</span></code></pre></div>
 <p>To change the default size from 1024x768 try:</p>
-<div class="sourceCode" id="cb6"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb6-1"><a href="#cb6-1" aria-hidden="true" tabindex="-1"></a><span class="fu">make</span> clobber XX=640 YY=480 alt</span></code></pre></div>
+<div class="sourceCode" id="cb6"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb6-1"><a href="#cb6-1" aria-hidden="true" tabindex="-1"></a>    <span class="fu">make</span> clobber XX=640 YY=480 alt</span></code></pre></div>
 <p>You might also wish to change the anti-alias setting:</p>
-<div class="sourceCode" id="cb7"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb7-1"><a href="#cb7-1" aria-hidden="true" tabindex="-1"></a><span class="fu">make</span> clobber AA=2 alt</span></code></pre></div>
+<div class="sourceCode" id="cb7"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb7-1"><a href="#cb7-1" aria-hidden="true" tabindex="-1"></a>    <span class="fu">make</span> clobber AA=2 alt</span></code></pre></div>
 <p>You may of course combine the above two commands and give any combination you
 wish.</p>
 <p>This is not possible with the author’s version but it is with the alt versions
 (Windows - see below - and otherwise).</p>
 <p>As the Windows version will not compile on most viewers’ systems we do not build
 it with <code>make alt</code>; instead try:</p>
-<div class="sourceCode" id="cb8"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb8-1"><a href="#cb8-1" aria-hidden="true" tabindex="-1"></a><span class="fu">make</span> alt2</span></code></pre></div>
+<div class="sourceCode" id="cb8"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb8-1"><a href="#cb8-1" aria-hidden="true" tabindex="-1"></a>    <span class="fu">make</span> alt2</span></code></pre></div>
 <h3 id="alternate-use">Alternate use:</h3>
 <p>Use <code>gavare.alt</code>, <code>gavare.r3</code> or <code>gavare.alt2</code> as you would <code>gavare</code> above.</p>
 <h2 id="judges-remarks">Judges’ remarks:</h2>