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/meyer/index.html

@@ -132,8 +132,7 @@
 <h2 id="author"><a name="author"></a>Author:</h2>
 <ul>
 <li>Name: <a href="../../authors.html#Raphael_Meyer">Raphael Meyer</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 -->
@@ -142,13 +141,13 @@ Location: <a href="../../location.html#US">US</a> - <em>United States of America
 <!-- 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">./meyer</span> <span class="pp">[</span><span class="ss">SEED</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">./meyer</span> <span class="pp">[</span><span class="ss">SEED</span><span class="pp">]</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">./meyer</span> <span class="pp">[</span><span class="ss">SEED</span><span class="pp">]</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">./meyer</span> <span class="pp">[</span><span class="ss">SEED</span><span class="pp">]</span></span></code></pre></div>
 <p>For your first input try:</p>
-<pre><code>a 0 1</code></pre>
+<pre><code>    a 0 1</code></pre>
 <p>where <code>a</code> is the row (<code>a</code>-<code>i</code>), <code>0</code> is the column (<code>0</code>-<code>8</code>) and <code>1</code> is the
 number (<code>1</code>-<code>9</code>).</p>
 <p>NOTE: if you do not input three different ‘words’ it will block. You can input
@@ -182,9 +181,9 @@ disoriented program.</p>
 <p>Comparing this program to a potential object-oriented implementation,
 it is obvious, that object-oriented code isn’t ‘<code>WYWIWID</code>’ (‘what
 you write is what it does’). It may be tempting to think that</p>
-<pre><code>Object o;</code></pre>
+<pre><code>    Object o;</code></pre>
 <p>might do something similar as</p>
-<div class="sourceCode" id="cb6"><pre class="sourceCode c"><code class="sourceCode c"><span id="cb6-1"><a href="#cb6-1" aria-hidden="true" tabindex="-1"></a><span class="kw">struct</span> not_an_object o<span class="op">;</span></span></code></pre></div>
+<div class="sourceCode" id="cb6"><pre class="sourceCode c"><code class="sourceCode c"><span id="cb6-1"><a href="#cb6-1" aria-hidden="true" tabindex="-1"></a>    <span class="kw">struct</span> not_an_object o<span class="op">;</span></span></code></pre></div>
 <p>But this program reveals that it doesn’t. Even worse, this program only
 reveals the tip of the iceberg, what kind of black magic is involved in
 a simple declaration of an object.</p>
@@ -202,7 +201,7 @@ and <a href="https://en.wikipedia.org/wiki/Polymorphism_(computer_science)">poly
 <p>It is left as an exercise to the reader to find a corresponding
 implementation in a popular object-oriented programming language.</p>
 <h3 id="starting-the-game">Starting the game</h3>
-<div class="sourceCode" id="cb7"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb7-1"><a href="#cb7-1" aria-hidden="true" tabindex="-1"></a><span class="ex">./meyer</span> <span class="pp">[</span><span class="ss">SEED</span><span class="pp">]</span></span></code></pre></div>
+<div class="sourceCode" id="cb7"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb7-1"><a href="#cb7-1" aria-hidden="true" tabindex="-1"></a>    <span class="ex">./meyer</span> <span class="pp">[</span><span class="ss">SEED</span><span class="pp">]</span></span></code></pre></div>
 <h3 id="gameplay">Gameplay</h3>
 <p>It is a <a href="https://en.wikipedia.org/wiki/Sudoku">sudoku</a> based game. The goal of
 the game is to be able to do the last valid ‘move’.</p>
@@ -214,11 +213,11 @@ breaking the following rule. Any number must be unique in its:</p>
 <li>3x3 block.</li>
 </ol>
 <p>Expected input for your move:</p>
-<pre><code>row column number</code></pre>
+<pre><code>    row column number</code></pre>
 <p>where</p>
-<pre><code>row:    [a-i]
-column: [0-8]
-number: [1-9].</code></pre>
+<pre><code>    row:    [a-i]
+    column: [0-8]
+    number: [1-9].</code></pre>
 <p>The game can be aborted with <code>q</code>.</p>
 <p>The one who can do the last move wins the game.</p>
 <!--