add hack-a-round for language specified markdown code blocks

When language is specified in a markdown code block such as:

````
```c
    printf("Hello, world!\n");
```
````

is used, the resulting HTML as produced by `pandoc(1)` combined
with our revised `ioccc.css` is not intent the code block well.

A temporary "_hack-a-round_" is to turn the "markdown code language
specifier" into an HTML comment.  For example:

````
```<!---c-->
    printf("Hello, world!\n");
```
````

This commits turns off existing markdown code language specifiers
for now, while preserving our ability to restore them in the future
when a better  "_hack-a-round_" to the "markdown code language
specifier" problem is found.

The HTML impact if this "_hack-a-round_" is to produce HTML that
looks like this:

```
<pre class="&lt;!---c--&gt;"><code> .. </code></pre>
```

We might be able to create a complex set of classes for each markdown
code language (there won't be very many) in `ioccc.css`, or we might
find a more general CSS (or maybe `pandoc(1)`?) solution.

For now, this hack-a-round will have to do.

1995/garry/index.html

@@ -141,22 +141,22 @@ Location: <a href="../../location.html#DE">DE</a> - <em>Federal Republic of Germ
 <!-- 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>
+<pre class="&lt;!---sh--&gt;"><code>    make all</code></pre>
 <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="ex">./garry</span> <span class="op">&lt;</span>input_file <span class="op">&gt;</span>output_file</span></code></pre></div>
+<pre class="&lt;!---sh--&gt;"><code>    ./garry &lt;input_file &gt;output_file</code></pre>
 <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>
+<pre class="&lt;!---sh--&gt;"><code>    ./try.sh</code></pre>
 <h2 id="alternate-code">Alternate code:</h2>
 <p>While it may not have been the intention of the author, the
 judges noted that the C pre-processed version (with the <code>#include</code>s
 left intact) looked very much like a rat “dropping core”. See
 <a href="garry.alt.c">garry.alt.c</a> and judge for yourself!</p>
 <h3 id="alternate-build">Alternate build:</h3>
-<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">make</span> alt</span></code></pre></div>
+<pre class="&lt;!---sh--&gt;"><code>    make alt</code></pre>
 <h3 id="alternate-use">Alternate use:</h3>
-<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">./garry.alt</span> <span class="op">&lt;</span>input_file <span class="op">&gt;</span>output_file</span></code></pre></div>
+<pre class="&lt;!---sh--&gt;"><code>    ./garry.alt &lt;input_file &gt;output_file</code></pre>
 <h3 id="alternate-try">Alternate try:</h3>
-<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="ex">./try.alt.sh</span></span></code></pre></div>
+<pre class="&lt;!---sh--&gt;"><code>    ./try.alt.sh</code></pre>
 <h2 id="judges-remarks">Judges’ remarks:</h2>
 <p>The author was kind enough to provide a less obfuscated version of
 the source called <a href="garry.fmt.c">garry.fmt.c</a>.</p>
@@ -166,9 +166,9 @@ incorporating the ability to create binary from escaped data in the
 environment variables.</p>
 <p>The calling syntax is pretty simple, just use it with <code>stdio</code>-redirection
 or inside pipelines, e.g.:</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="ex">./garry</span> <span class="op">&lt;</span>file_to_convert <span class="op">&gt;</span>converted_file</span></code></pre></div>
+<pre class="&lt;!---sh--&gt;"><code>    ./garry &lt;file_to_convert &gt;converted_file</code></pre>
 <p>or</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="fu">cat</span> all_my_files/<span class="pp">*</span> <span class="kw">|</span> <span class="ex">./garry</span> <span class="kw">|</span> <span class="fu">lp</span></span></code></pre></div>
+<pre class="&lt;!---sh--&gt;"><code>    cat all_my_files/* | ./garry | lp</code></pre>
 <p>The syntax of the conversion of the input file is as follows: To include the
 value of an environment variable in the output file, place the name of the
 variable between <code>$</code>-signs in the input, e.g.:</p>
@@ -177,10 +177,10 @@ variable between <code>$</code>-signs in the input, e.g.:</p>
 <p>Unknown Env-variables or malformed expressions are ignored and kept intact.</p>
 <p>Additionally, the filter replaces escaped octal values in the environment
 variables by their binary representation, e.g.:</p>
-<div class="sourceCode" id="cb10"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb10-1"><a href="#cb10-1" aria-hidden="true" tabindex="-1"></a>    <span class="ex">$</span> TEST=<span class="st">&quot;\110\145\154\154\157&quot;</span></span>
-<span id="cb10-2"><a href="#cb10-2" aria-hidden="true" tabindex="-1"></a>    <span class="ex">$</span> export TEST</span>
-<span id="cb10-3"><a href="#cb10-3" aria-hidden="true" tabindex="-1"></a>    <span class="ex">$</span> echo <span class="st">&#39;$TEST$&#39;</span> <span class="kw">|</span> <span class="ex">./garry</span></span>
-<span id="cb10-4"><a href="#cb10-4" aria-hidden="true" tabindex="-1"></a>    <span class="ex">Hello</span></span></code></pre></div>
+<pre class="&lt;!---sh--&gt;"><code>    $ TEST=&quot;\110\145\154\154\157&quot;
+    $ export TEST
+    $ echo &#39;$TEST$&#39; | ./garry
+    Hello</code></pre>
 <!--
 
     Copyright © 1984-2024 by Landon Curt Noll. All Rights Reserved.