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.

2005/boutines/index.html

@@ -132,8 +132,7 @@
 <h2 id="author"><a name="author"></a>Author:</h2>
 <ul>
 <li>Name: <a href="../../authors.html#Francois_Boutines">Francois Boutines</a><br>
-Location: <a href="../../location.html#FR">FR</a> - <em>French Republic</em> (<em>France</em>)
-<br><br></li>
+Location: <a href="../../location.html#FR">FR</a> - <em>French Republic</em> (<em>France</em>)</li>
 </ul>
 
 <!-- END: next line ends content generated by: bin/output-index-author.sh -->
@@ -142,7 +141,7 @@ Location: <a href="../../location.html#FR">FR</a> - <em>French Republic</em> (<e
 <!-- 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>
 <p>You will need an <a href="https://www.w3.org/TR/SVG11/expanded-toc.html">SVG</a> viewer or
 a converter like <a href="https://imagemagick.org/index.php">ImageMagick</a>’s <code>convert</code>.
@@ -150,11 +149,11 @@ See <a href="../../faq.html#imagemagick">FAQ 3.17 - How do I compile and install
 require it?</a>.</p>
 <p>Look here to find some <a href="https://www.w3.org/Graphics/SVG/WG/wiki/Implementations">SVG Viewer
 Implementations</a>.</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="ex">./boutines</span> <span class="op">&lt;</span> input <span class="op">&gt;</span> output.svg</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">./boutines</span> <span class="op">&lt;</span> input <span class="op">&gt;</span> output.svg</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>
 <p>If <code>ruby</code> is installed <a href="try.sh">try.sh</a> will generate an SVG file by:</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">ruby</span> <span class="at">-e</span> <span class="st">&#39;20.times{puts &quot;#{rand} #{rand}&quot;}&#39;</span> <span class="kw">|</span> <span class="ex">./boutines</span> <span class="op">&gt;</span> test.svg</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">ruby</span> <span class="at">-e</span> <span class="st">&#39;20.times{puts &quot;#{rand} #{rand}&quot;}&#39;</span> <span class="kw">|</span> <span class="ex">./boutines</span> <span class="op">&gt;</span> test.svg</span></code></pre></div>
 <p>It will also create an SVG file with the file <a href="input.txt">input.txt</a>.</p>
 <p>The script will check if <code>convert</code> is available and if so it will try converting
 the SVG file(s) to PNG file(s) which you should be able to view in most any
@@ -179,16 +178,16 @@ square</a>.</p>
 <p>A <a href="https://en.wikipedia.org/wiki/Voronoi_diagram">Voronoi diagram</a> of the set as
 an <a href="https://www.w3.org/TR/SVG11/expanded-toc.html">SVG</a> stream.</p>
 <p>This will possibly save a compressed SVG file and may be useful:</p>
-<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">./boutines</span> <span class="kw">|</span> <span class="fu">gzip</span> <span class="op">&gt;</span> result.svg.gz</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">./boutines</span> <span class="kw">|</span> <span class="fu">gzip</span> <span class="op">&gt;</span> result.svg.gz</span></code></pre></div>
 <p>Input consists of a list of floating points values separated by whitespaces
 (ranging preferably in <code>[0,1]</code>). Alternating a horizontal coordinate, a
 whitespace then the other coordinate (pointing downwards in the resulting
 graph) and a newline will just go fine:</p>
-<pre><code>0  0
-0  1
-1  0
-1  1
-.5 .5</code></pre>
+<pre><code>    0  0
+    0  1
+    1  0
+    1  1
+    .5 .5</code></pre>
 <p>Strictly speaking, you have to provide a <strong>set</strong> of points. If there are
 duplicates in the list, there is no guarantee on the one to be shown (in
 addition their labels will overlap) in the resulting colored <a href="https://en.wikipedia.org/wiki/Voronoi_diagram">Voronoi