Fixes in 1986/marshall/compilers.{md,html}

1986/marshall/index.html

@@ -409,7 +409,8 @@ if nothing else.</p>
 <h2 id="to-use">To use:</h2>
 <pre><code>    ./marshall</code></pre>
 <h2 id="alternate-code">Alternate code:</h2>
-<p>Due to the different <a href="compilers.html">conflicting problems</a> with gcc and clang, we
+<p>Due to the different <a href="compilers.html">conflicting problems</a> with <code>gcc</code> and
+<code>clang</code>, we
 instead offer the problematic code as an alternate version whereas
 <a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1986/marshall/marshall.c">marshall.c</a> has both the infinite loop and the complicated arg to
 <code>_exit()</code> commented out, changing the value passed into <code>_exit()</code> to <code>1</code>.</p>