improve IOCCC rules and guidelines

Fixed a number of typos, inconsistencies, and problems with the
rules and guidelines.

Improved how the closed version of the rules and guidelines declare
themselves at the top of the markdown and HTML file.

Changed `next/rules.md` VERSION from "2024-06-29-v28"
to "28.1 2024-06-29" in order to be more consistent
with IOCCC tool version format.

Changed `next/guidelines.md` VERSION from "2024-06-29-v28"
to "28.1 2024-06-29" in order to be more consistent
with IOCCC tool version format.

Make a minor format fix to `faq.md`.

Performed `make status` and `make www` to test the above umder macOS.

faq.html

@@ -2081,8 +2081,8 @@ very easily. To do that <code>cd 1991/dds</code> and then do:</p>
 <h4 id="tip-if-you-have-colordiff-installed-its-a-lot-easier-to-see-the-differences">Tip: if you have <code>colordiff</code> installed it’s a lot easier to see the differences</h4>
 <p>To use these rules but provide a different <code>diff</code>, for instance <code>colordiff</code>,
 just do:</p>
-<pre><code>    make DIFF=colordiff diff_orig_prog # for orig to prog diff
-    make DIFF=colordiff diff_alt_prog # for alt to prog diff</code></pre>
+<pre><code>    make DIFF=colordiff diff_orig_prog          # for orig to prog diff
+    make DIFF=colordiff diff_alt_prog           # for alt to prog diff</code></pre>
 <p>Obviously if you want to view the alternate code or the orig code you can just open
 the files as described above.</p>
 <div id="faq4_3">