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.

2006/toledo1/index.html

@@ -132,8 +132,7 @@
 <h2 id="author"><a name="author"></a>Author:</h2>
 <ul>
 <li>Name: <a href="../../authors.html#Oscar_Toledo">Oscar Toledo G.</a><br>
-Location: <a href="../../location.html#MX">MX</a> - <em>United Mexican States</em> (<em>Mexico</em>)
-<br><br></li>
+Location: <a href="../../location.html#MX">MX</a> - <em>United Mexican States</em> (<em>Mexico</em>)</li>
 </ul>
 
 <!-- END: next line ends content generated by: bin/output-index-author.sh -->
@@ -142,12 +141,12 @@ Location: <a href="../../location.html#MX">MX</a> - <em>United Mexican States</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">./toledo1</span> <span class="pp">[</span><span class="ss">0</span><span class="pp">-</span><span class="ss">9</span><span class="pp">][</span><span class="ss">0</span><span class="pp">-</span><span class="ss">9</span><span class="pp">]</span></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">./toledo1</span> <span class="pp">[</span><span class="ss">0</span><span class="pp">-</span><span class="ss">9</span><span class="pp">][</span><span class="ss">0</span><span class="pp">-</span><span class="ss">9</span><span class="pp">]</span></span></code></pre></div>
 <p>where <code>[0-9][0-9]</code> is a two digit number.</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>
 <h2 id="judges-remarks">Judges’ remarks:</h2>
 <p>For most of the arguments (e.g. those above) the resulting path
 is not circular, but at least one starting point yields a circular path.</p>
@@ -158,11 +157,11 @@ be expected, and some dump core?</p>
 visit the 64 squares without repeating them?</p>
 <p>If not, this program does it, just run it with an argument
 giving initial position.</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">./toledo1</span> 11       <span class="co"># start is A8</span></span>
-<span id="cb4-2"><a href="#cb4-2" aria-hidden="true" tabindex="-1"></a><span class="ex">./toledo1</span> 18       <span class="co"># start is H8</span></span>
-<span id="cb4-3"><a href="#cb4-3" aria-hidden="true" tabindex="-1"></a><span class="ex">./toledo1</span> 81       <span class="co"># start is A1</span></span>
-<span id="cb4-4"><a href="#cb4-4" aria-hidden="true" tabindex="-1"></a><span class="ex">./toledo1</span> 88       <span class="co"># start is H1</span></span>
-<span id="cb4-5"><a href="#cb4-5" aria-hidden="true" tabindex="-1"></a><span class="ex">./toledo1</span> 44       <span class="co"># start is D5</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">./toledo1</span> 11       <span class="co"># start is A8</span></span>
+<span id="cb4-2"><a href="#cb4-2" aria-hidden="true" tabindex="-1"></a>    <span class="ex">./toledo1</span> 18       <span class="co"># start is H8</span></span>
+<span id="cb4-3"><a href="#cb4-3" aria-hidden="true" tabindex="-1"></a>    <span class="ex">./toledo1</span> 81       <span class="co"># start is A1</span></span>
+<span id="cb4-4"><a href="#cb4-4" aria-hidden="true" tabindex="-1"></a>    <span class="ex">./toledo1</span> 88       <span class="co"># start is H1</span></span>
+<span id="cb4-5"><a href="#cb4-5" aria-hidden="true" tabindex="-1"></a>    <span class="ex">./toledo1</span> 44       <span class="co"># start is D5</span></span></code></pre></div>
 <p>It will print move order. The algorithm is so simple that you can read
 it in the source code. At the first glance it can appear checkered.
 Nevertheless, don’t be dismayed, jar, jar. :-)</p>