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.

2014/endoh1/README.md

@@ -1,20 +1,20 @@
 ## To build:
 
-```sh
+```<!---sh-->
     make
 ```
 
 
 ## To use:
 
-```sh
+```<!---sh-->
     ./prog > foo.c
 ```
 
 
 ## Try:
 
-```sh
+```<!---sh-->
     ./try.sh
 ```
 
@@ -36,14 +36,14 @@ What is the difference between running `./prog` and `main`?
 Big terminals with tiny fonts have their uses in certain cases.
 One of them is:
 
-```sh
+```<!---sh-->
     make treacl
     ./treacl
 ```
 
 which is shorthand for:
 
-```sh
+```<!---sh-->
     ./prog < prog.c > treacle.c
     make treacle
     ./treacle

2014/endoh1/index.html

@@ -141,11 +141,11 @@ Location: <a href="../../location.html#JP">JP</a> - <em>Japan</em></li>
 <!-- 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></span></code></pre></div>
+<pre class="&lt;!---sh--&gt;"><code>    make</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">./prog</span> <span class="op">&gt;</span> foo.c</span></code></pre></div>
+<pre class="&lt;!---sh--&gt;"><code>    ./prog &gt; foo.c</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>
 <p>The script will ask you if you wish to run <code>make rake</code> but this is not necessary
 to fully enjoy the entry. <code>make rake</code> will run the <a href="rake.sh">rake.sh</a> script and
 then <code>prog</code> if all is built okay. If <code>rake</code> is not installed then it will check
@@ -159,12 +159,12 @@ build <code>main.c</code>.</p>
 <h2 id="judges-remarks">Judges’ remarks:</h2>
 <p>Big terminals with tiny fonts have their uses in certain cases.
 One of them is:</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">make</span> treacl</span>
-<span id="cb4-2"><a href="#cb4-2" aria-hidden="true" tabindex="-1"></a>    <span class="ex">./treacl</span></span></code></pre></div>
+<pre class="&lt;!---sh--&gt;"><code>    make treacl
+    ./treacl</code></pre>
 <p>which is shorthand for:</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="ex">./prog</span> <span class="op">&lt;</span> prog.c <span class="op">&gt;</span> treacle.c</span>
-<span id="cb5-2"><a href="#cb5-2" aria-hidden="true" tabindex="-1"></a>    <span class="fu">make</span> treacle</span>
-<span id="cb5-3"><a href="#cb5-3" aria-hidden="true" tabindex="-1"></a>    <span class="ex">./treacle</span></span></code></pre></div>
+<pre class="&lt;!---sh--&gt;"><code>    ./prog &lt; prog.c &gt; treacle.c
+    make treacle
+    ./treacle</code></pre>
 <p>When using a smartphone to read the output, you may need to
 step back to see the bigger picture because that picture is worth
 more than 1000 words.</p>

2014/endoh1/spoilers.html

@@ -134,7 +134,7 @@ the program!</p>
 <h2 id="how-did-i-achieve-that">How did I achieve that?</h2>
 <p>It is known that we can mitigate the quine restriction by <code>eval</code>.
 For example, this is a quine written in Ruby:</p>
-<div class="sourceCode" id="cb1"><pre class="sourceCode ruby"><code class="sourceCode ruby"><span id="cb1-1"><a href="#cb1-1" aria-hidden="true" tabindex="-1"></a>    <span class="fu">eval</span> s<span class="kw">=</span><span class="st">&quot;print &#39;eval s=&#39;; p s&quot;</span></span></code></pre></div>
+<pre class="&lt;!---ruby--&gt;"><code>    eval s=&quot;print &#39;eval s=&#39;; p s&quot;</code></pre>
 <p>Note that <code>print</code> appears just once in the program.</p>
 <p>To emulate this approach in C, I adopted the following structure.</p>
 <pre><code>    char s[]=&quot;&lt;main code&gt;int main() { &lt;VM code&gt; }&quot;;
@@ -230,8 +230,8 @@ renaming and automatic register allocation only for this purpose.</p>
 <li><a href="gen-prog.c">gen-prog.c</a> generates <a href="prog.c">prog.c</a> based on <code>main.c</code>.</li>
 </ul>
 <p>You can run the process by <code>rake</code> command. <code>ruby-minisat</code> gem is needed.</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="ex">$</span> gem install ruby-minisat</span>
-<span id="cb4-2"><a href="#cb4-2" aria-hidden="true" tabindex="-1"></a>    <span class="ex">$</span> rake</span></code></pre></div>
+<pre class="&lt;!---sh--&gt;"><code>    $ gem install ruby-minisat
+    $ rake</code></pre>
 <h2 id="tools">Tools</h2>
 <p>I checked that the following QR code readers can read the output of my program.</p>
 <ul>
@@ -243,13 +243,13 @@ found at
 <code>https://play.google.com/store/apps/details?id=com.google.zxing.client.android</code>
 but it appears to no longer exist.</p>
 <p>You can use <a href="tool.rb">tool.rb</a> to convert the output to a png file.</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="ex">./main</span> Hello <span class="kw">|</span> <span class="ex">ruby</span> tool.rb <span class="op">&gt;</span> hello.png</span>
-<span id="cb5-2"><a href="#cb5-2" aria-hidden="true" tabindex="-1"></a></span>
-<span id="cb5-3"><a href="#cb5-3" aria-hidden="true" tabindex="-1"></a>    <span class="ex">$</span> zbarimg <span class="at">-q</span> hello.png</span>
-<span id="cb5-4"><a href="#cb5-4" aria-hidden="true" tabindex="-1"></a>    <span class="ex">QR-Code:Hello</span></span>
-<span id="cb5-5"><a href="#cb5-5" aria-hidden="true" tabindex="-1"></a></span>
-<span id="cb5-6"><a href="#cb5-6" aria-hidden="true" tabindex="-1"></a>    <span class="ex">$</span> ruby tool.rb prog.c</span>
-<span id="cb5-7"><a href="#cb5-7" aria-hidden="true" tabindex="-1"></a>    <span class="ex">$</span> ruby tool.rb prog.c <span class="kw">|</span> <span class="ex">ruby</span> tool.rb</span></code></pre></div>
+<pre class="&lt;!---sh--&gt;"><code>    ./main Hello | ruby tool.rb &gt; hello.png
+
+    $ zbarimg -q hello.png
+    QR-Code:Hello
+
+    $ ruby tool.rb prog.c
+    $ ruby tool.rb prog.c | ruby tool.rb</code></pre>
 <h2 id="limitations">Limitations</h2>
 <ul>
 <li>QR code error correction level is fixed to L (Low).</li>

2014/endoh1/spoilers.md

@@ -18,7 +18,7 @@ Do you think that it is possible to write QR code encoder in C within *1kB*?
 It is known that we can mitigate the quine restriction by `eval`.
 For example, this is a quine written in Ruby:
 
-```ruby
+```<!---ruby-->
     eval s="print 'eval s='; p s"
 ```
 
@@ -122,7 +122,7 @@ The compiler tool chain is the following.
 
 You can run the process by `rake` command.  `ruby-minisat` gem is needed.
 
-```sh
+```<!---sh-->
     $ gem install ruby-minisat
     $ rake
 ```
@@ -145,7 +145,7 @@ but it appears to no longer exist.
 
 You can use [tool.rb](tool.rb) to convert the output to a png file.
 
-```sh
+```<!---sh-->
     ./main Hello | ruby tool.rb > hello.png
 
     $ zbarimg -q hello.png