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.

1996/jonth/index.html

@@ -132,8 +132,7 @@
 <h2 id="author"><a name="author"></a>Author:</h2>
 <ul>
 <li>Name: <a href="../../authors.html#Jon_Thingvold">Jon Thingvold</a><br>
-Location: <a href="../../location.html#NO">NO</a> - <em>Kingdom of Norway</em> (<em>Norway</em>)
-<br><br></li>
+Location: <a href="../../location.html#NO">NO</a> - <em>Kingdom of Norway</em> (<em>Norway</em>)</li>
 </ul>
 
 <!-- END: next line ends content generated by: bin/output-index-author.sh -->
@@ -142,28 +141,28 @@ Location: <a href="../../location.html#NO">NO</a> - <em>Kingdom of Norway</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> all</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> all</span></code></pre></div>
 <p>NOTE: this entry requires <code>X11/Xlib.h</code> header file and the X11 library to
 compile. macOS users running Mountain Lion and later will need to download and
 install <a href="https://www.xquartz.org">XQuartz</a> in order to compile and run this
 entry.</p>
 <h3 id="bugs-and-misfeatures">Bugs and (Mis)features:</h3>
 <p>The current status of this entry is:</p>
-<pre><code>STATUS: INABIAF - please **DO NOT** fix
-STATUS: missing or dead link - please provide them</code></pre>
+<pre><code>    STATUS: INABIAF - please **DO NOT** fix
+    STATUS: missing or dead link - please provide them</code></pre>
 <p>For more detailed information see <a href="../../bugs.html#1996_jonth">1996 jonth bugs</a>.</p>
 <h2 id="to-use">To use:</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">./jonth</span> :0 :0</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">./jonth</span> :0 :0</span></code></pre></div>
 <p>NOTE: the two boards will be on top of each other so you will have to drag one
 off the other so that you can properly play.</p>
 <p>NOTE: if there is no X service open this will crash. If this is the case you
 might try:</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">./jonth</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">./jonth</span></span></code></pre></div>
 <p>These are supposed to happen. As is written in the
 <a href="http://catb.org/jargon/html/F/feature.html">The Jargon File</a>:</p>
-<pre><code>That&#39;s not a bug, that&#39;s a feature.</code></pre>
+<pre><code>    That&#39;s not a bug, that&#39;s a feature.</code></pre>
 <h2 id="try">Try:</h2>
-<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">./jonth</span> host1:0 host2:0</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">./jonth</span> host1:0 host2:0</span></code></pre></div>
 <h2 id="judges-remarks">Judges’ remarks:</h2>
 <p>For extra credit, figure out how you can cheat by taking over a square already
 occupied by an opponent.</p>