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.

2005/persano/index.html

@@ -132,8 +132,7 @@
 <h2 id="author"><a name="author"></a>Author:</h2>
 <ul>
 <li>Name: <a href="../../authors.html#Mauro_Persano">Mauro Persano</a><br>
-Location: <a href="../../location.html#BR">BR</a> - <em>Federative Republic of Brazil</em> (<em>Brazil</em>)
-<br><br></li>
+Location: <a href="../../location.html#BR">BR</a> - <em>Federative Republic of Brazil</em> (<em>Brazil</em>)</li>
 </ul>
 
 <!-- END: next line ends content generated by: bin/output-index-author.sh -->
@@ -142,13 +141,13 @@ Location: <a href="../../location.html#BR">BR</a> - <em>Federative Republic of B
 <!-- 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 is an alternate version of this entry which should work for Windows by
 setting binary mode on <code>stdout</code>. See <a href="#alternate-code">alternate code</a> below.</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">./persano</span> p q [num frames]</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">./persano</span> p q [num frames]</span></code></pre></div>
 <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>Open the <a href="https://en.wikipedia.org/wiki/GIF">GIF</a> files with a viewer capable of
 displaying animated GIFs and watch closely at the bottom of the picture (you may
 need to use <a href="https://www.lcdf.org/gifsicle/">gifsicle</a> - a great tool to
@@ -159,11 +158,11 @@ generated by the entry).</p>
 functions <code>_setmode()</code> and <code>_fileno(3)</code> to set binary mode on <code>stdout</code> which should
 let it work with Windows.</p>
 <h3 id="alternate-build">Alternate build:</h3>
-<pre><code>make alt</code></pre>
+<pre><code>    make alt</code></pre>
 <h3 id="alternate-use">Alternate use:</h3>
 <p>Use <code>persano.alt</code> as you would <code>persano</code> above.</p>
 <h3 id="alternate-try">Alternate try:</h3>
-<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="ex">./persano.alt</span> 3 16 <span class="op">&gt;</span> knot3-16.gif</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="ex">./persano.alt</span> 3 16 <span class="op">&gt;</span> knot3-16.gif</span></code></pre></div>
 <p>Follow the same instructions, using different tools if necessary, as the above
 try section.</p>
 <h2 id="judges-remarks">Judges’ remarks:</h2>
@@ -180,7 +179,7 @@ linker option).</p>
 <p><strong>knot</strong> writes animated GIF images of rendered <a href="https://en.wikipedia.org/wiki/Torus_knot">torus
 knots</a> to standard output.</p>
 <h3 id="synopsis">SYNOPSIS</h3>
-<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="ex">./persano</span> p q [num frames]</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="ex">./persano</span> p q [num frames]</span></code></pre></div>
 <h3 id="description">DESCRIPTION</h3>
 <p>A <code>(p,q)</code>-<a href="https://en.wikipedia.org/wiki/Torus_knot">torus knot</a> is a closed,
 non-intersecting curve on the surface of a
@@ -191,10 +190,10 @@ resulting curve will <em>not</em> be a knot (that is, imagining the resulting cu
 a loop of rubber, there will be a way to bend, twist and stretch it, without
 cutting it <a href="#fn1" class="footnote-ref" id="fnref1" role="doc-noteref"><sup>1</sup></a>, until it ends up looking just like a circle embedded in R3 <a href="#fn2" class="footnote-ref" id="fnref2" role="doc-noteref"><sup>2</sup></a>).</p>
 <p>Sample usage:</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="ex">./persano</span> 3 2 1 <span class="op">&gt;</span> foo.gif</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="ex">./persano</span> 3 2 1 <span class="op">&gt;</span> foo.gif</span></code></pre></div>
 <p>writes a non-animated GIF (a single frame) stream of a rendered trefoil
 knot to the file <code>foo.gif</code>.</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="ex">./persano</span> 5 2</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="ex">./persano</span> 5 2</span></code></pre></div>
 <p>writes a GIF stream with a rendering of <a href="https://en.wikipedia.org/wiki/Solomon%27s_knot">Solomon’s Seal
 knot</a> to standard
 output; since the number of frames is not specified, an animation with