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.

1990/pjr/index.html

@@ -132,8 +132,7 @@
 <h2 id="author"><a name="author"></a>Author:</h2>
 <ul>
 <li>Name: <a href="../../authors.html#Peter_J_Ruczynski">Peter J Ruczynski</a><br>
-Location: <a href="../../location.html#GB">GB</a> - <em>United Kingdom of Great Britain and Northern Ireland</em> (<em>United Kingdom</em>)
-<br><br></li>
+Location: <a href="../../location.html#GB">GB</a> - <em>United Kingdom of Great Britain and Northern Ireland</em> (<em>United Kingdom</em>)</li>
 </ul>
 
 <!-- END: next line ends content generated by: bin/output-index-author.sh -->
@@ -142,24 +141,24 @@ Location: <a href="../../location.html#GB">GB</a> - <em>United Kingdom of Great
 <!-- 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>There is an <a href="#alternate-code">alternate version</a> that does something different
 that can be used if your compiler is incapable of compiling <code>X=g()...</code> in
 <code>main()</code>. It can be used for another purpose too.</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">./pjr</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">./pjr</span></span></code></pre></div>
 <h2 id="alternate-code">Alternate code:</h2>
 <p>Note that some compilers will be unable to compile the expression <code>X=g()...</code> in
 <code>main()</code> due to lack of temporary stack space. One might want to try replacing
 <code>main()</code> with:</p>
-<div class="sourceCode" id="cb3"><pre class="sourceCode c"><code class="sourceCode c"><span id="cb3-1"><a href="#cb3-1" aria-hidden="true" tabindex="-1"></a>main<span class="op">(){</span>X<span class="op">=</span>s<span class="op">().</span>v<span class="op">().</span>o<span class="op">().</span>o<span class="op">().</span>l<span class="op">().</span>S<span class="op">().</span>d<span class="op">().</span>l<span class="op">().</span>i<span class="op">().</span>o<span class="op">().</span>w<span class="op">().</span>N<span class="op">();}</span></span></code></pre></div>
+<div class="sourceCode" id="cb3"><pre class="sourceCode c"><code class="sourceCode c"><span id="cb3-1"><a href="#cb3-1" aria-hidden="true" tabindex="-1"></a>    main<span class="op">(){</span>X<span class="op">=</span>s<span class="op">().</span>v<span class="op">().</span>o<span class="op">().</span>o<span class="op">().</span>l<span class="op">().</span>S<span class="op">().</span>d<span class="op">().</span>l<span class="op">().</span>i<span class="op">().</span>o<span class="op">().</span>w<span class="op">().</span>N<span class="op">();}</span></span></code></pre></div>
 <p>if this is a problem, which is what this alternate code is.</p>
 <p>NOTE: it prints something else and it is what the author suggested one try as
 well.</p>
 <h3 id="alternate-build">Alternate build:</h3>
-<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="fu">make</span> alt</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="fu">make</span> alt</span></code></pre></div>
 <h3 id="alternate-use">Alternate use:</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">./pjr.alt</span></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">./pjr.alt</span></span></code></pre></div>
 <h2 id="judges-remarks">Judges’ remarks:</h2>
 <p>This program prints out a string. Can you figure out how
 it is done?</p>
@@ -174,12 +173,12 @@ to functions!</p>
 <p>It is simple to make the program print other strings. Each
 alphabetical character from a to z is printed out as its
 opposite:</p>
-<pre><code>a-&gt;z b-&gt;y c-&gt;x etc</code></pre>
+<pre><code>    a-&gt;z b-&gt;y c-&gt;x etc</code></pre>
 <p>To encode a new string input the string as it is meant to come out:</p>
-<div class="sourceCode" id="cb7"><pre class="sourceCode c"><code class="sourceCode c"><span id="cb7-1"><a href="#cb7-1" aria-hidden="true" tabindex="-1"></a>X<span class="op">=</span>s<span class="op">().</span>v<span class="op">().</span>o<span class="op">().</span>o<span class="op">().</span>l<span class="op">().</span>S<span class="op">().</span>d<span class="op">().</span>l<span class="op">().</span>i<span class="op">().</span>o<span class="op">().</span>w<span class="op">().</span>N<span class="op">();</span></span></code></pre></div>
+<div class="sourceCode" id="cb7"><pre class="sourceCode c"><code class="sourceCode c"><span id="cb7-1"><a href="#cb7-1" aria-hidden="true" tabindex="-1"></a>    X<span class="op">=</span>s<span class="op">().</span>v<span class="op">().</span>o<span class="op">().</span>o<span class="op">().</span>l<span class="op">().</span>S<span class="op">().</span>d<span class="op">().</span>l<span class="op">().</span>i<span class="op">().</span>o<span class="op">().</span>w<span class="op">().</span>N<span class="op">();</span></span></code></pre></div>
 <p>Note: <code>S()</code> represents a space and <code>N()</code> a newline. This will now
 produce…</p>
-<pre><code>hello world</code></pre>
+<pre><code>    hello world</code></pre>
 <p>By the way, there is actually a piece of code which is not used
 in the original program! I leave it as an intellectual exercise
 to the reader to find out what it is.</p>