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.

2001/westley/README.md

@@ -1,6 +1,6 @@
 ## To build:
 
-```sh
+```<!---sh-->
     make
 ```
 
@@ -25,7 +25,7 @@ For more detailed information see [2001 westley bugs](../../bugs.html#2001_westl
 
 ## To use:
 
-```sh
+```<!---sh-->
     ./westley 2>/dev/null
     # enter some input, terminate with EOF
 
@@ -37,7 +37,7 @@ For more detailed information see [2001 westley bugs](../../bugs.html#2001_westl
 
 ## Try:
 
-```sh
+```<!---sh-->
     ./try.sh
 ```
 
@@ -60,7 +60,7 @@ everyone in the face! :-) This is also compiled by default.
 
 ### Punch card try:
 
-```sh
+```<!---sh-->
     echo 'Brian Westley does it again!' | ./westley.punch 2>/dev/null
 ```
 
@@ -73,7 +73,7 @@ This alternate code might be less portable.
 
 ### Alternate build:
 
-```sh
+```<!---sh-->
     make alt
 ```
 
@@ -108,7 +108,7 @@ to punch cards - C programs can be written to be "drop proof".
 
 Consider the following C program:
 
-```c
+```<!---c-->
     main(){a();b();c();}
     a(){printf("A");}
     b(){printf("B");}
@@ -122,7 +122,7 @@ any particular order\*\*; it will always produce `ABC` as output.
 
 You can also use global variables:
 
-```c
+```<!---c-->
     char *greet = "Hello, world!";
     char *greet; main(){puts(greet);}
 ```
@@ -132,7 +132,7 @@ It would be trivial to write an entire C program that is
 possible to write a program that will always compile but
 behave differently depending on the line order:
 
-```c
+```<!---c-->
     test(a,b){return a;}
     #define test(a,b) test(b,a)
     main(){if (test(0,1)) printf("T"); else printf("F");}
@@ -144,7 +144,7 @@ falls between the declaration of `test()` and its use in
 you can use the same call to `test()` repeatedly in
 different lines to return different values:
 
-```c
+```<!---c-->
     #define test(x,y) test(y,x)
     main(){int i=0;a(&i);b(&i);c(&i);d(&i);printf("%d\n",i);}
     a(i)int*i;{if (test(0,1)) *i += 1;}