Fix XHTML well-formedness and validity.

expat/doc/reference.html

@@ -1667,12 +1667,12 @@ check these features to do so at runtime.</p>
 <p>The return value is an array of strings, terminated by NULL,
 identifying the feature-test macros Expat was compiled with.  Common
 features which may be found in this list include
-<code>"XML_DTD"</code> and <code>"XML_UNICODE"</code>.
+<code>"XML_DTD"</code> and <code>"XML_UNICODE"</code>.</p>
 </div>
 
 <hr />
 <p><a href="http://validator.w3.org/check/referer"><img
         src="valid-xhtml10.png" alt="Valid XHTML 1.0!"
-        border="0" height="31" width="88" /></a></p>
+        height="31" width="88" class="noborder" /></a></p>
 </body>
 </html>

expat/doc/style.css

@@ -2,6 +2,10 @@ body {
   background-color: white
 }
 
+.noborder {
+  border-width: 0px;
+}
+
 .eg {
   padding-left: 1em;
   padding-top: .5em;