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/bugs.html

@@ -141,7 +141,7 @@ like some of the other features this was not intentionally designed but is
 simply a fun consequence of the features I did implement.</p>
 <p>Let’s say you want to verify that the evade mode is at the right count. How
 can you verify it without modifying the code? Try:</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="va">SIZE</span><span class="op">=</span>0 <span class="va">SHED</span><span class="op">=</span>1 <span class="va">SHEDS</span><span class="op">=</span>1 <span class="va">EVADE</span><span class="op">=</span>10 <span class="ex">./prog</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="va">SIZE</span><span class="op">=</span>0 <span class="va">SHED</span><span class="op">=</span>1 <span class="va">SHEDS</span><span class="op">=</span>1 <span class="va">EVADE</span><span class="op">=</span>10 <span class="ex">./prog</span></span></code></pre></div>
 <p>Since you start out at size 0 and you shed every movement then when you’re
 size 10 (as long as you don’t eat a bug of course!) the bug should evade.</p>
 <p>If you set it to <code>SIZE=10</code> there would be a difference of 10. Now every
@@ -154,7 +154,7 @@ don’t at this time remember any I might have done.</p>
 <h1 id="the-snake-doesnt-seem-to-be-moving"><a name="stillsnake" href="#toc">The snake doesn’t seem to be moving</a></h1>
 <p>One way to show this is in full is to set the initial size and growth size to a
 high value; then try each one individually. For example:</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="va">SIZE</span><span class="op">=</span>100 <span class="ex">./prog</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="va">SIZE</span><span class="op">=</span>100 <span class="ex">./prog</span></span></code></pre></div>
 <p>In this case after you make the first move the snake will keep growing and
 so the snake tail stays in the same spot until after it’s the ‘full size’.
 When it has reached the full size then the entire body of the snake will
@@ -199,26 +199,26 @@ show as a gameplay mode); and &lt; 0 it will ‘shrink’ as I explained above.
 say that it’s defying physics by growing and shrinking simultaneously but either
 way negative size will force a win.</p>
 <p>Here’s a fun output:</p>
-<pre><code>&lt; &lt;&lt;&lt;+</code></pre>
+<pre><code>    &lt; &lt;&lt;&lt;+</code></pre>
 <p>That’s from:</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="va">SHED</span><span class="op">=</span>1 <span class="va">SHEDS</span><span class="op">=</span>-1 <span class="ex">./prog</span></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="va">SHED</span><span class="op">=</span>1 <span class="va">SHEDS</span><span class="op">=</span>-1 <span class="ex">./prog</span></span></code></pre></div>
 <p>And right after that you would see:</p>
-<pre><code>YOU WIN!
-X:72/156 Y:20/41 S:997/997 B:0</code></pre>
+<pre><code>    YOU WIN!
+    X:72/156 Y:20/41 S:997/997 B:0</code></pre>
 <p>Try this though:</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="va">SHEDS</span><span class="op">=</span>-1 <span class="va">SHED</span><span class="op">=</span>25 <span class="ex">./prog</span></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="va">SHEDS</span><span class="op">=</span>-1 <span class="va">SHED</span><span class="op">=</span>25 <span class="ex">./prog</span></span></code></pre></div>
 <p>And you’ll see that you start to be the normal size but then you leave your
 head several places until you end up getting to the max size (by way of it
 being unsigned). This isn’t a bug even if it might seem like one. In fact
 this is the basis of the grow/shrink mode of play that I talk about in the
 <a href="gameplay.html">gameplay.html</a> (<a href="gameplay.md">gameplay.md</a> on GitHub) file.</p>
 <p>Here’s another thing to be aware of. Let’s say you do:</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="va">SIZE</span><span class="op">=</span>1 <span class="va">GROW</span><span class="op">=</span>-1 <span class="ex">./prog</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="va">SIZE</span><span class="op">=</span>1 <span class="va">GROW</span><span class="op">=</span>-1 <span class="ex">./prog</span></span></code></pre></div>
 <p>How many bugs will it take before you win? In fact it’s two: you would see the
 head twice: the second time once you ‘shrink’ down to size 0; it would then be
 that if you get another bug you will be at the ‘max size’:</p>
-<div class="sourceCode" id="cb8"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb8-1"><a href="#cb8-1" aria-hidden="true" tabindex="-1"></a><span class="ex">YOU</span> WIN!</span>
-<span id="cb8-2"><a href="#cb8-2" aria-hidden="true" tabindex="-1"></a><span class="ex">X:81/156</span> Y:35/41 S:997/997 B:2</span></code></pre></div>
+<div class="sourceCode" id="cb8"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb8-1"><a href="#cb8-1" aria-hidden="true" tabindex="-1"></a>    <span class="ex">YOU</span> WIN!</span>
+<span id="cb8-2"><a href="#cb8-2" aria-hidden="true" tabindex="-1"></a>    <span class="ex">X:81/156</span> Y:35/41 S:997/997 B:2</span></code></pre></div>
 <h1 id="i-was-a-few-places-behind-my-tail-and-i-ran-into-it"><a name="bitetail" href="#toc">‘I was a few places behind my tail and I ran into it!’</a></h1>
 <p>I.e. what happens if you’re growing - for example after just eating a bug - and
 you’re racing towards your tail? If you’re behind it should be fine since you’re
@@ -231,15 +231,15 @@ me and I figured I better note it.</p>
 <p>For instance it might look like this (the first line is as it happens, the
 second pointing to where it happens and the third being what’s left after the
 rest of the snake has gone through). Doing <code>SHED=100 SHEDS=-1</code>:</p>
-<pre><code>ooooooooo&gt;ooo&gt;
-         ^
-         &gt;</code></pre>
+<pre><code>    ooooooooo&gt;ooo&gt;
+             ^
+             &gt;</code></pre>
 <p>The <code>^</code> points to the part that’s split from the snake and which will be
 there on its own after the snake passes through it. Here’s an example with
 it being <code>SHEDS=-3</code>:</p>
-<pre><code>&lt;ooo&lt;ooooo
-    ^^^
-    &lt;oo</code></pre>
+<pre><code>    &lt;ooo&lt;ooooo
+        ^^^
+        &lt;oo</code></pre>
 <p>If you go through the part that has split (which for some might be difficult
 to see whilst the snake has not fully left its skin) you won’t run into
 yourself; if you run into another part though you do. This might be a bit
@@ -257,7 +257,7 @@ of the screen the snake is occupying is the place which is actually moving: if
 the snake decreases in size by 3 then the three respective characters you can go
 through safely. But this also means that a bug can go there! So you might see
 something like:</p>
-<pre><code>&lt;*oooooooo</code></pre>
+<pre><code>    &lt;*oooooooo</code></pre>
 <p>This is because the snake is no longer there: in fact in this run the snake was
 quite a bit lower on the screen and 25 in length.</p>
 <h1 id="on-the-safety-of-the-bug-placement-loop"><a name="bugplacement" href="#toc">On the safety of the bug placement loop</a></h1>
@@ -271,23 +271,23 @@ how it’s done in Snake and works well). The minimum terminal size I require in
 the game is 10 x 10. This includes the walls and score line.</p>
 <p>Now the default max snake size is 997 but when the terminal is too small it
 adjusts the max snake size. For 10 lines and 10 columns you would see:</p>
-<div class="sourceCode" id="cb12"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb12-1"><a href="#cb12-1" aria-hidden="true" tabindex="-1"></a><span class="ex">$</span> make test</span>
-<span id="cb12-2"><a href="#cb12-2" aria-hidden="true" tabindex="-1"></a><span class="ex">terminal</span> supports cursor movement</span>
-<span id="cb12-3"><a href="#cb12-3" aria-hidden="true" tabindex="-1"></a><span class="ex">terminal</span> supports making cursor invisible</span>
-<span id="cb12-4"><a href="#cb12-4" aria-hidden="true" tabindex="-1"></a><span class="ex">terminal</span> supports bold</span>
-<span id="cb12-5"><a href="#cb12-5" aria-hidden="true" tabindex="-1"></a><span class="ex">terminal</span> supports colours</span>
+<div class="sourceCode" id="cb12"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb12-1"><a href="#cb12-1" aria-hidden="true" tabindex="-1"></a>    <span class="ex">$</span> make test</span>
+<span id="cb12-2"><a href="#cb12-2" aria-hidden="true" tabindex="-1"></a>    <span class="ex">terminal</span> supports cursor movement</span>
+<span id="cb12-3"><a href="#cb12-3" aria-hidden="true" tabindex="-1"></a>    <span class="ex">terminal</span> supports making cursor invisible</span>
+<span id="cb12-4"><a href="#cb12-4" aria-hidden="true" tabindex="-1"></a>    <span class="ex">terminal</span> supports bold</span>
+<span id="cb12-5"><a href="#cb12-5" aria-hidden="true" tabindex="-1"></a>    <span class="ex">terminal</span> supports colours</span>
 <span id="cb12-6"><a href="#cb12-6" aria-hidden="true" tabindex="-1"></a></span>
-<span id="cb12-7"><a href="#cb12-7" aria-hidden="true" tabindex="-1"></a><span class="ex">terminal</span> rows  10 <span class="er">(</span><span class="ex">7</span>   playable<span class="kw">)</span></span>
-<span id="cb12-8"><a href="#cb12-8" aria-hidden="true" tabindex="-1"></a><span class="ex">terminal</span> cols  10 <span class="er">(</span><span class="ex">8</span>   playable<span class="kw">)</span></span>
+<span id="cb12-7"><a href="#cb12-7" aria-hidden="true" tabindex="-1"></a>    <span class="ex">terminal</span> rows  10 <span class="er">(</span><span class="ex">7</span>   playable<span class="kw">)</span></span>
+<span id="cb12-8"><a href="#cb12-8" aria-hidden="true" tabindex="-1"></a>    <span class="ex">terminal</span> cols  10 <span class="er">(</span><span class="ex">8</span>   playable<span class="kw">)</span></span>
 <span id="cb12-9"><a href="#cb12-9" aria-hidden="true" tabindex="-1"></a></span>
-<span id="cb12-10"><a href="#cb12-10" aria-hidden="true" tabindex="-1"></a><span class="ex">snake</span> size:    49 <span class="er">(</span><span class="ex">max</span> size: 49<span class="kw">)</span></span>
-<span id="cb12-11"><a href="#cb12-11" aria-hidden="true" tabindex="-1"></a>      <span class="ex">bugs:</span>     9 <span class="er">(</span><span class="ex">max</span> size: 9<span class="kw">)</span></span>
+<span id="cb12-10"><a href="#cb12-10" aria-hidden="true" tabindex="-1"></a>    <span class="ex">snake</span> size:    49 <span class="er">(</span><span class="ex">max</span> size: 49<span class="kw">)</span></span>
+<span id="cb12-11"><a href="#cb12-11" aria-hidden="true" tabindex="-1"></a>          <span class="ex">bugs:</span>     9 <span class="er">(</span><span class="ex">max</span> size: 9<span class="kw">)</span></span>
 <span id="cb12-12"><a href="#cb12-12" aria-hidden="true" tabindex="-1"></a></span>
-<span id="cb12-13"><a href="#cb12-13" aria-hidden="true" tabindex="-1"></a><span class="ex">at</span> least 28 columns recommended for snake size 49    <span class="er">(</span><span class="ex">is</span> 10<span class="kw">)</span></span>
-<span id="cb12-14"><a href="#cb12-14" aria-hidden="true" tabindex="-1"></a><span class="ex">at</span> least 28 columns recommended for snake size 49    <span class="er">(</span><span class="ex">is</span> 10<span class="kw">)</span></span>
+<span id="cb12-13"><a href="#cb12-13" aria-hidden="true" tabindex="-1"></a>    <span class="ex">at</span> least 28 columns recommended for snake size 49    <span class="er">(</span><span class="ex">is</span> 10<span class="kw">)</span></span>
+<span id="cb12-14"><a href="#cb12-14" aria-hidden="true" tabindex="-1"></a>    <span class="ex">at</span> least 28 columns recommended for snake size 49    <span class="er">(</span><span class="ex">is</span> 10<span class="kw">)</span></span>
 <span id="cb12-15"><a href="#cb12-15" aria-hidden="true" tabindex="-1"></a></span>
-<span id="cb12-16"><a href="#cb12-16" aria-hidden="true" tabindex="-1"></a><span class="ex">1</span> problem detected <span class="er">(</span><span class="ex">0</span> fatal<span class="kw">)</span><span class="bu">.</span></span>
-<span id="cb12-17"><a href="#cb12-17" aria-hidden="true" tabindex="-1"></a><span class="ex">make:</span> <span class="pp">***</span> <span class="pp">[</span><span class="ss">test</span><span class="pp">]</span> Error 1</span></code></pre></div>
+<span id="cb12-16"><a href="#cb12-16" aria-hidden="true" tabindex="-1"></a>    <span class="ex">1</span> problem detected <span class="er">(</span><span class="ex">0</span> fatal<span class="kw">)</span><span class="bu">.</span></span>
+<span id="cb12-17"><a href="#cb12-17" aria-hidden="true" tabindex="-1"></a>    <span class="ex">make:</span> <span class="pp">***</span> <span class="pp">[</span><span class="ss">test</span><span class="pp">]</span> Error 1</span></code></pre></div>
 <p>First: what’s the problem? It’s just a warning that for the snake size of 49 the
 recommended size of columns is 28. However this is just for the score text; with
 only 10 columns it will overflow and wrap to the next line(s). But if you observe