fix HTML problems with bugs.html and thanks-for-help.html

thanks-for-help.html

@@ -172,10 +172,9 @@ the second line starts with <code>o, world!\n"</code>.</p>
 <p>By request, the original code is provided as
 <a href="1984/anonymous/anonymous.alt.c">anonymous.alt.c</a> so that one can look at it and
 the famous tattoo which we also include here:</p>
-<figure>
-<img src="1984/anonymous/1984-anonymous-tattoo.jpg" alt="1984-anonymous-tattoo.jpg" />
-<figcaption aria-hidden="true">1984-anonymous-tattoo.jpg</figcaption>
-</figure>
+<p><img src="1984/anonymous/1984-anonymous-tattoo.jpg"
+ alt="image of a tattoo of the 1984 anonymous C code"
+ width=600 height=401></p>
 <p>…which was done in 2005 by <a href="https://web.archive.org/web/20070120220721/https://thomasscovell.com/tattoo.php">Thomas
 Scovell</a>.</p>
 <div id="1984_decot">