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.

2000/anderson/index.html

@@ -132,8 +132,7 @@
 <h2 id="author"><a name="author"></a>Author:</h2>
 <ul>
 <li>Name: <a href="../../authors.html#Glyn_Anderson">Glyn Anderson</a><br>
-Location: <a href="../../location.html#ZZ">ZZ</a> - <em>Unknown location</em>
-<br><br></li>
+Location: <a href="../../location.html#ZZ">ZZ</a> - <em>Unknown location</em></li>
 </ul>
 
 <!-- END: next line ends content generated by: bin/output-index-author.sh -->
@@ -142,11 +141,11 @@ Location: <a href="../../location.html#ZZ">ZZ</a> - <em>Unknown location</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>
 <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="bu">echo</span> something <span class="kw">|</span> <span class="ex">./anderson</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="bu">echo</span> something <span class="kw">|</span> <span class="ex">./anderson</span></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>
 <h2 id="judges-remarks">Judges’ remarks:</h2>
 <p>This small program might be a nice addition to a digital personal
 organizer; just in case you are stranded on a desert island and need to
@@ -172,17 +171,16 @@ characters are ignored. The codes themselves are written to standard
 output as a depiction of a person holding two flags, using only ASCII
 characters (semaphore smileys, if you will). For example, given the
 input “Hello, world!”, the output will be:</p>
-<pre><code>              &lt;&gt;       &lt;&gt;       &lt;&gt;    &lt;&gt;                  &lt;&gt;     &lt;&gt;
-  _()       ()/      ()/      ()/     _\)       ()       (/_     _\)
-[] /^      |^^      /^^      /^^    [] ^^      |^^|      ^^ [] [] ^^
-  &lt;&gt;[      [][     &lt;&gt;][     &lt;&gt;][       ][      [][]      ][       ][
+<pre><code>                  &lt;&gt;       &lt;&gt;       &lt;&gt;    &lt;&gt;                  &lt;&gt;     &lt;&gt;
+      _()       ()/      ()/      ()/     _\)       ()       (/_     _\)
+    [] /^      |^^      /^^      /^^    [] ^^      |^^|      ^^ [] [] ^^
+      &lt;&gt;[      [][     &lt;&gt;][     &lt;&gt;][       ][      [][]      ][       ][
 
 
-              &lt;&gt;    []
-  _()_      ()/     |()       ()
-[] ^^ []   /^^       ^^|     |^^|
-   ][     &lt;&gt;][       ][]     [][]
-</code></pre>
+                  &lt;&gt;    []
+      _()_      ()/     |()       ()
+    [] ^^ []   /^^       ^^|     |^^|
+       ][     &lt;&gt;][       ][]     [][]</code></pre>
 <p>The program is obfuscated without the use of the preprocessor or any
 special compilation parameters. In fact, the program doesn’t even
 bother using any keywords, save the single <code>char</code> at the beginning.