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.

1990/dg/README.md

@@ -1,21 +1,21 @@
 ## To build:
 
 ```sh
-make all
+    make all
 ```
 
 
 ## To use:
 
 ```sh
-echo foo bar | ./dg
+    echo foo bar | ./dg
 ```
 
 
 ## Try:
 
 ```sh
-./try.sh
+    ./try.sh
 ```
 
 
@@ -25,13 +25,13 @@ Some C preprocessors got confused about single quotes in certain cases.
 In particular, the following source line:
 
 ```c
-b12(ase(bco(acp(bi(acp(bcp(acp(bpl(aqu(bqu(A))))))))))))))))))))))))))))))
+    b12(ase(bco(acp(bi(acp(bcp(acp(bpl(aqu(bqu(A))))))))))))))))))))))))))))))
 ```
 
 sometimes has to be changed to:
 
 ```c
-b12(ase(bco(acp(bi(acp(bcp(acp(bpl('A'))))))))))))))))))))))))))))
+    b12(ase(bco(acp(bi(acp(bcp(acp(bpl('A'))))))))))))))))))))))))))))
 ```
 
 particularly if the C preprocessor botches single quotes in cpp expansions,
@@ -57,7 +57,7 @@ character is in the set `A-Za-z`. `l[]` is an array that gets filled
 with:
 
 ```c
-"nopqrstuvwxyzzzzabcdefghijklmmmmNOPQRSTUVWXYZZZZABCDEFGHIJKLMMMM"
+    "nopqrstuvwxyzzzzabcdefghijklmmmmNOPQRSTUVWXYZZZZABCDEFGHIJKLMMMM"
 ```
 
 If `index(3)` says the char is in the alphabet, then XOR the offset

1990/dg/index.html

@@ -132,8 +132,7 @@
 <h2 id="author"><a name="author"></a>Author:</h2>
 <ul>
 <li>Name: <a href="../../authors.html#David_Goodenough">David Goodenough</a><br>
-Location: <a href="../../location.html#ZZ">ZZ</a> - <em>Unknown location</em>
-<br><br></li>
+Location: <a href="../../location.html#ZZ">ZZ</a> - <em>Unknown location</em></li>
 </ul>
 
 <!-- END: next line ends content generated by: bin/output-index-author.sh -->
@@ -142,17 +141,17 @@ Location: <a href="../../location.html#ZZ">ZZ</a> - <em>Unknown location</em>
 <!-- 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> all</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> all</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="bu">echo</span> foo bar <span class="kw">|</span> <span class="ex">./dg</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="bu">echo</span> foo bar <span class="kw">|</span> <span class="ex">./dg</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">./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>
 <h2 id="judges-remarks">Judges’ remarks:</h2>
 <p>Some C preprocessors got confused about single quotes in certain cases.
 In particular, the following source line:</p>
-<div class="sourceCode" id="cb4"><pre class="sourceCode c"><code class="sourceCode c"><span id="cb4-1"><a href="#cb4-1" aria-hidden="true" tabindex="-1"></a>b12<span class="op">(</span>ase<span class="op">(</span>bco<span class="op">(</span>acp<span class="op">(</span>bi<span class="op">(</span>acp<span class="op">(</span>bcp<span class="op">(</span>acp<span class="op">(</span>bpl<span class="op">(</span>aqu<span class="op">(</span>bqu<span class="op">(</span>A<span class="op">))))))))))))))))))))))))))))))</span></span></code></pre></div>
+<div class="sourceCode" id="cb4"><pre class="sourceCode c"><code class="sourceCode c"><span id="cb4-1"><a href="#cb4-1" aria-hidden="true" tabindex="-1"></a>    b12<span class="op">(</span>ase<span class="op">(</span>bco<span class="op">(</span>acp<span class="op">(</span>bi<span class="op">(</span>acp<span class="op">(</span>bcp<span class="op">(</span>acp<span class="op">(</span>bpl<span class="op">(</span>aqu<span class="op">(</span>bqu<span class="op">(</span>A<span class="op">))))))))))))))))))))))))))))))</span></span></code></pre></div>
 <p>sometimes has to be changed to:</p>
-<div class="sourceCode" id="cb5"><pre class="sourceCode c"><code class="sourceCode c"><span id="cb5-1"><a href="#cb5-1" aria-hidden="true" tabindex="-1"></a>b12<span class="op">(</span>ase<span class="op">(</span>bco<span class="op">(</span>acp<span class="op">(</span>bi<span class="op">(</span>acp<span class="op">(</span>bcp<span class="op">(</span>acp<span class="op">(</span>bpl<span class="op">(</span><span class="ch">&#39;A&#39;</span><span class="op">))))))))))))))))))))))))))))</span></span></code></pre></div>
+<div class="sourceCode" id="cb5"><pre class="sourceCode c"><code class="sourceCode c"><span id="cb5-1"><a href="#cb5-1" aria-hidden="true" tabindex="-1"></a>    b12<span class="op">(</span>ase<span class="op">(</span>bco<span class="op">(</span>acp<span class="op">(</span>bi<span class="op">(</span>acp<span class="op">(</span>bcp<span class="op">(</span>acp<span class="op">(</span>bpl<span class="op">(</span><span class="ch">&#39;A&#39;</span><span class="op">))))))))))))))))))))))))))))</span></span></code></pre></div>
 <p>particularly if the C preprocessor botches single quotes in cpp expansions,
 which we have done for the wider audience.</p>
 <h2 id="authors-remarks">Author’s remarks:</h2>
@@ -168,7 +167,7 @@ source. The <code>axx()</code> <code>#define</code>s do the same, but add tokens
 <p>As for the rot13 algorithm, it relies on <code>index(3)</code> to find if the
 character is in the set <code>A-Za-z</code>. <code>l[]</code> is an array that gets filled
 with:</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="st">&quot;nopqrstuvwxyzzzzabcdefghijklmmmmNOPQRSTUVWXYZZZZABCDEFGHIJKLMMMM&quot;</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="st">&quot;nopqrstuvwxyzzzzabcdefghijklmmmmNOPQRSTUVWXYZZZZABCDEFGHIJKLMMMM&quot;</span></span></code></pre></div>
 <p>If <code>index(3)</code> says the char is in the alphabet, then XOR the offset
 with <code>16</code> to translate, and output, otherwise pass it unchanged.</p>
 <!--