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.

2020/ferguson1/COMPILING.html

@@ -146,7 +146,7 @@ matters; I only have Intel CPUs and arm64 (MacBook Pro M1).</p>
 <p>I imagine that it works for 32-bit systems but I do not know for sure.</p>
 <h1 id="portability-macos">Portability: macOS</h1>
 <p>You should be able to get the compiler with:</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">sudo</span> xcode-select <span class="at">--install</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">sudo</span> xcode-select <span class="at">--install</span></span></code></pre></div>
 <p>You don’t need Xcode itself and it appears that the command line tools (as above
 should install) already has ncurses so there shouldn’t be anything else that
 needs to be done. But I’m not actually sure of this - I’m seeing conflicting
@@ -159,20 +159,20 @@ so that you don’t need sudo because … Well never mind.</p>
 you want to use the Makefile) to compile and link this entry. With Fedora more
 recent versions there’s the <code>dnf</code> package manager but I cannot help with any of
 the GUI installers since I don’t use them. Something like:</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">sudo</span> dnf install ncurses-devel ncurses make gcc</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">sudo</span> dnf install ncurses-devel ncurses make gcc</span></code></pre></div>
 <p>or</p>
-<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="co"># dnf install ncurses-devel ncurses make gcc</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="co"># dnf install ncurses-devel ncurses make gcc</span></span></code></pre></div>
 <h1 id="portability-centos">Portability: CentOS</h1>
 <p>Just like Fedora you will need <code>gcc</code>, <code>ncurses</code>, <code>ncurses-devel</code> (and if you
 want to use the Makefile <code>make</code>). CentOS uses <code>yum</code> and CentOS 8 uses <code>dnf</code>.
 So:</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="fu">sudo</span> yum install ncurses-devel ncurses make gcc</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">sudo</span> yum install ncurses-devel ncurses make gcc</span></code></pre></div>
 <p>or</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="co"># yum install ncurses-devel ncurses make gcc</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="co"># yum install ncurses-devel ncurses make gcc</span></span></code></pre></div>
 <p>or</p>
-<div class="sourceCode" id="cb6"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb6-1"><a href="#cb6-1" aria-hidden="true" tabindex="-1"></a><span class="fu">sudo</span> dnf install ncurses-devel ncurses make gcc</span></code></pre></div>
+<div class="sourceCode" id="cb6"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb6-1"><a href="#cb6-1" aria-hidden="true" tabindex="-1"></a>    <span class="fu">sudo</span> dnf install ncurses-devel ncurses make gcc</span></code></pre></div>
 <p>or</p>
-<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="co"># dnf install ncurses-devel ncurses make gcc</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="co"># dnf install ncurses-devel ncurses make gcc</span></span></code></pre></div>
 <p>You can also use clang to compile (which is what gcc actually is under macOS).</p>
 <h1 id="compilation-notes">Compilation notes</h1>
 <p>As long as you have the dependencies above the only thing that comes to mind is