Finish fixing html files in 2004

There is one thing brought up on GitHub that might necessitate a minor
change but that can happen later.

thanks-for-help.html

@@ -3101,7 +3101,7 @@ FAQ on “<a href="faq.html#arg_count">main function args</a>”
 for more details.</p>
 <p>Cody also added the <a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2004/kopczynski/try.sh">try.sh</a> script and various data
 files: <a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2004/kopczynski/kopczynski-a">kopczynski-a</a> to demonstrate what happens when art more
-like a letter is fed to the program and the <code>kopczynski*-rev</code> files which are
+like a letter is fed to the program, and the <code>kopczynski*-rev</code> files which are
 the data files reversed with <code>rev(1)</code>. One had to be modified additionally to
 get it to work, that being <code>kopczynski-10-rev</code>.</p>
 <div id="2004_newbern">