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.

1993/cmills/index.html

@@ -132,8 +132,7 @@
 <h2 id="author"><a name="author"></a>Author:</h2>
 <ul>
 <li>Name: <a href="../../authors.html#Christopher_Mills">Christopher Mills</a><br>
-Location: <a href="../../location.html#US">US</a> - <em>United States of America</em> (<em>United States</em>)
-<br><br></li>
+Location: <a href="../../location.html#US">US</a> - <em>United States of America</em> (<em>United States</em>)</li>
 </ul>
 
 <!-- END: next line ends content generated by: bin/output-index-author.sh -->
@@ -145,21 +144,21 @@ Location: <a href="../../location.html#US">US</a> - <em>United States of America
 <p>We recommend you try the alt version first so you can get a better idea of what
 this entry was like back in 1993. See the <a href="#original-code">original code</a>
 section below to run the original.</p>
-<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> alt</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> alt</span></code></pre></div>
 <p>NOTE: this entry requires the <code>X11/Xlib.h</code> header file and the X11 library to
 compile. If you’re under macOS and do not know how to install and use X11
 programs see <a href="../../faq.html#X11macos">FAQ 3.7 - How do I compile and use on macOS, an IOCCC entry that
 requires X11?</a>.</p>
 <p>To configure how many microseconds to sleep before updates try:</p>
-<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="fu">make</span> clobber SLEEP=200 alt</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="fu">make</span> clobber SLEEP=200 alt</span></code></pre></div>
 <h3 id="bugs-and-misfeatures">Bugs and (Mis)features:</h3>
 <p>The current status of this entry is:</p>
-<pre><code>STATUS: known bug - please help us fix</code></pre>
+<pre><code>    STATUS: known bug - please help us fix</code></pre>
 <p>For more detailed information see <a href="../../bugs.html#1993_cmills">1993 cmills bugs</a>.</p>
 <h2 id="to-use">To use:</h2>
-<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="va">DISPLAY</span><span class="op">=</span><span class="st">&quot;your_X_server_display&quot;</span></span>
-<span id="cb4-2"><a href="#cb4-2" aria-hidden="true" tabindex="-1"></a><span class="bu">export</span> <span class="va">DISPLAY</span></span>
-<span id="cb4-3"><a href="#cb4-3" aria-hidden="true" tabindex="-1"></a><span class="ex">./cmills.alt</span> <span class="pp">[</span><span class="ss">speed</span><span class="pp">]</span>    <span class="co"># must be run on an X11 server</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="va">DISPLAY</span><span class="op">=</span><span class="st">&quot;your_X_server_display&quot;</span></span>
+<span id="cb4-2"><a href="#cb4-2" aria-hidden="true" tabindex="-1"></a>    <span class="bu">export</span> <span class="va">DISPLAY</span></span>
+<span id="cb4-3"><a href="#cb4-3" aria-hidden="true" tabindex="-1"></a>    <span class="ex">./cmills.alt</span> <span class="pp">[</span><span class="ss">speed</span><span class="pp">]</span>        <span class="co"># must be run on an X11 server</span></span></code></pre></div>
 <p>where:</p>
 <p><code>speed</code> is update speed from 1 to 9 (default is 9).</p>
 <p>NOTE: in most cases <code>DISPLAY</code> should already be set.</p>
@@ -167,20 +166,20 @@ requires X11?</a>.</p>
 <p>We recommend the version that uses <code>usleep(3)</code> to more easily see what is going
 on but you can use the original without any delays if you wish.</p>
 <h3 id="original-build">Original build:</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="fu">make</span> all</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> all</span></code></pre></div>
 <h3 id="original-use">Original use:</h3>
 <p>Use <code>cmills</code> as you would <code>cmills.alt</code> above.</p>
 <h2 id="judges-remarks">Judges’ remarks:</h2>
 <p>From the San Jose Mercury News (May 15, 1993 page 20A “West Hackers
 trounce East in computer quiz game”):</p>
-<pre><code>&quot;Since 1984, a contest has been held on Usenet for the most
-unreadable, creative, bizarre but working C program&quot;, Gates
-said. &quot;What is the name of this contest&quot;
+<pre><code>    &quot;Since 1984, a contest has been held on Usenet for the most
+    unreadable, creative, bizarre but working C program&quot;, Gates
+    said. &quot;What is the name of this contest&quot;
 
-&quot;Windows,&quot; shot back Gassee, naming Microsoft&#39;s premier product
-- a product over which Apple sued Microsoft five years ago. Not
-the right answer - it&#39;s &quot;The Obfuscated C Contest [sic]&quot; - but
-it brought down the house of Apple partisans...</code></pre>
+    &quot;Windows,&quot; shot back Gassee, naming Microsoft&#39;s premier product
+    - a product over which Apple sued Microsoft five years ago. Not
+    the right answer - it&#39;s &quot;The Obfuscated C Contest [sic]&quot; - but
+    it brought down the house of Apple partisans...</code></pre>
 <p>[The expression on Bill Gates’ face was a sight to behold, as reported
 to us by several who were there].</p>
 <p>You must set <code>$DISPLAY</code> in your environment or the program will