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.

news.html

@@ -140,16 +140,16 @@ And while using Mastodon is free, the <a href="../judges.html">IOCCC judges</a>
 <p>All web pages, including this one, are now constructed from markdown files and/or JSON data files using tools found in the <a href="bin/index.html">bin</a> directory.</p>
 <h1 id="section-1">2023-05-22</h1>
 <p>We have been busy preparing for an important / significant update to this web site. In the <a href="https://github.com/ioccc-src/temp-test-ioccc">temp-test-ioccc GitHub repo</a> we have made nearly 2645 changes to date.</p>
-<pre><code>While you are free to look at the [temp-test-ioccc GitHub repo](https://github.com/ioccc-src/temp-test-ioccc),
-please **do not link to it** as this repo and related web site will disappear once the main
-[IOCCC winner repo](https://github.com/ioccc-src/winner) has been updated.
+<pre><code>    While you are free to look at the [temp-test-ioccc GitHub repo](https://github.com/ioccc-src/temp-test-ioccc),
+    please **do not link to it** as this repo and related web site will disappear once the main
+    [IOCCC winner repo](https://github.com/ioccc-src/winner) has been updated.
 
-Also be aware that the [temp-test-ioccc GitHub repo](https://github.com/ioccc-src/temp-test-ioccc)
-is undergoing rapid changes.  There are broken links and other things in mid-change.
+    Also be aware that the [temp-test-ioccc GitHub repo](https://github.com/ioccc-src/temp-test-ioccc)
+    is undergoing rapid changes.  There are broken links and other things in mid-change.
 
-Once we are ready to update the [IOCCC winner repo](https://github.com/ioccc-src/winner)
-and its associated web site,
-we will post a news article warning of the pending change that is about to arrive.</code></pre>
+    Once we are ready to update the [IOCCC winner repo](https://github.com/ioccc-src/winner)
+    and its associated web site,
+    we will post a news article warning of the pending change that is about to arrive.</code></pre>
 <p>These 2645+ changes in the <a href="https://github.com/ioccc-src/temp-test-ioccc">temp-test-ioccc GitHub repo</a>
 include diverse things such as:</p>
 <ul>
@@ -206,8 +206,8 @@ in <em>date(1)</em> format.</p>
 <a href="status.json">status.json</a> page,
 a <em>“latest_news”</em> JSON member whose value is the date
 of the most recent news item.</p>
-<div class="sourceCode" id="cb2"><pre class="sourceCode json"><code class="sourceCode json"><span id="cb2-1"><a href="#cb2-1" aria-hidden="true" tabindex="-1"></a><span class="er">&quot;status_date&quot;</span> <span class="er">:</span> <span class="er">&quot;Mon</span> <span class="er">Jan</span> <span class="er">30</span> <span class="er">02:28:44</span> <span class="er">PST</span> <span class="er">2023&quot;,</span></span>
-<span id="cb2-2"><a href="#cb2-2" aria-hidden="true" tabindex="-1"></a><span class="er">&quot;latest_news&quot;</span> <span class="er">:</span> <span class="er">&quot;Mon</span> <span class="er">Jan</span> <span class="er">30</span> <span class="er">02:28:44</span> <span class="er">PST</span> <span class="er">2023&quot;</span></span></code></pre></div>
+<div class="sourceCode" id="cb2"><pre class="sourceCode json"><code class="sourceCode json"><span id="cb2-1"><a href="#cb2-1" aria-hidden="true" tabindex="-1"></a>    <span class="er">&quot;status_date&quot;</span> <span class="er">:</span> <span class="er">&quot;Mon</span> <span class="er">Jan</span> <span class="er">30</span> <span class="er">02:28:44</span> <span class="er">PST</span> <span class="er">2023&quot;,</span></span>
+<span id="cb2-2"><a href="#cb2-2" aria-hidden="true" tabindex="-1"></a>    <span class="er">&quot;latest_news&quot;</span> <span class="er">:</span> <span class="er">&quot;Mon</span> <span class="er">Jan</span> <span class="er">30</span> <span class="er">02:28:44</span> <span class="er">PST</span> <span class="er">2023&quot;</span></span></code></pre></div>
 <h1 id="section-3">2022-12-18</h1>
 <p>As per the suggestion of <a href="https://fosstodon.org/@Virtaava@home.social">Toni Mikkola</a>
 (_<span class="citation" data-cites="Virtaava">@Virtaava</span><span class="citation" data-cites="home.social_">@home.social_</span>) we now maintain a
@@ -231,8 +231,8 @@ and/or follow us on Mastodon via <strong><span class="citation" data-cites="iocc
 <a href="https://twitter.com/ioccc">IOCCC Twitter feed</a>
 in favor of our new <a href="https://fosstodon.org/@ioccc">IOCCC Mastodon</a> feed.</p>
 <p>Our Mastodon username is: <strong><span class="citation" data-cites="ioccc">@ioccc</span><span class="citation" data-cites="fosstodon.org">@fosstodon.org</span></strong>.</p>
-<pre><code>Please note: As of the date of this posting, our account was just setup,
-so there isn&#39;t much to read there, yet.</code></pre>
+<pre><code>    Please note: As of the date of this posting, our account was just setup,
+    so there isn&#39;t much to read there, yet.</code></pre>
 <p>In the future we plan to use Mastodon as our official announcement platform.
 This will include announcing:</p>
 <ul>
@@ -251,7 +251,7 @@ Proving a Mastodon username will be entirely <strong>optional</strong>.</p>
 <p>If you do not yet have a Mastodon account, you may obtain a <strong>free mastodon account via</strong>:
 <a href="https://joinmastodon.org">joinmastodon.org</a>.</p>
 <p>If you do have / obtain a Mastodon account, <strong>please do us a favor and follow the IOCCC at</strong>:</p>
-<pre><code>**@ioccc@fosstodon.org**</code></pre>
+<pre><code>    **@ioccc@fosstodon.org**</code></pre>
 <p>The IOCCC wishes to thank the good folk running the
 <a href="https://hub.fosstodon.org/about/">fosstodon.org</a>
 Mastodon hub.