fix some HTML validation errors

faq.html

@@ -505,7 +505,7 @@
 <h2 id="miscellaneous-ioccc">10. <a href="#misc">Miscellaneous IOCCC</a></h2>
 <ul>
 <li><a class="normal" href="#mirrors">May I mirror the IOCCC website?</a></li>
-<li><a class="normal" href="#copyright">May I use parts of the IOCCC in an article, book, newsletter, or instructional material?</a></li>
+<li><a class="normal" href="#ioccc_copyright">May I use parts of the IOCCC in an article, book, newsletter, or instructional material?</a></li>
 <li><a class="normal" href="#first_person">Why do you sometimes use the first person plural?</a></li>
 <li><a class="normal" href="#dot_files"> What is the purpose of the <code>.top</code>, <code>.allyear</code>, <code>.year</code> and <code>.path</code> files?</a></li>
 <li><a class="normal" href="#terms"> What is the current meaning of the IOCCC terms Author, Entry, and Submission?</a></li>
@@ -1174,7 +1174,7 @@ entries that do not win on their web page for everyone to see.</p>
 </div>
 Jump to: <a href="#">top</a>
 <div id="mkiocccentry_checks">
-<h3 id="q-what-sort-of-checks-does-the-mkiocccentry-tool-perform">Q: What sort of checks does the mkiocccentry tool perform?</a></h3>
+<h3 id="q-what-sort-of-checks-does-the-mkiocccentry-tool-perform">Q: What sort of checks does the mkiocccentry tool perform?</h3>
 </div>
 <p><code>mkiocccentry(1)</code> will check and warn about the following conditions:</p>
 <ul>
@@ -3624,13 +3624,11 @@ See also the
 FAQ on “<a href="#pull_request">GitHub pull request</a>”
 for more information about pull requests.</p>
 <p>Jump to: <a href="#">top</a></p>
-<div id="macos">
 <div id="macos_errors">
 <div id="macos_compile">
 <h3 id="q-why-do-some-ioccc-entries-fail-to-compile-under-macos">Q: Why do some IOCCC entries fail to compile under macOS?</h3>
 </div>
 </div>
-</div>
 <p>If the entry requires gcc and you did not explicitly install gcc in macOS you
 will not be able to run or use these entries. This is because macOS gcc is
 actually clang, even <code>/usr/bin/gcc</code>.</p>
@@ -4748,7 +4746,7 @@ and certainly <strong>OUT OF DATE</strong>.</p>
 date with the latest changes when possible. Thank you.</p>
 <p>Jump to: <a href="#">top</a></p>
 <div id="permission">
-<div id="copyright">
+<div id="ioccc_copyright">
 <h3 id="q-may-i-use-parts-of-the-ioccc-in-an-article-book-newsletter-or-instructional-material">Q: May I use parts of the IOCCC in an article, book, newsletter, or instructional material?</h3>
 </div>
 </div>
@@ -5369,7 +5367,7 @@ for more information.</p>
 <p>Jump to: <a href="#">top</a></p>
 <div id="ioccc_bof">
 <div id="bof">
-<h3 id="q-what-is-an-ioccc-bof">Q: What is an IOCCC BOF?</a></h3>
+<h3 id="q-what-is-an-ioccc-bof">Q: What is an IOCCC BOF?</h3>
 </div>
 </div>
 <p>The term <strong>IOCCC BOF</strong> stood for <strong>International Obfuscated C Code