Fix HTML markup problem.

Author: gkellogg

index.html

@@ -3532,7 +3532,7 @@ <h3>Using the Document Base for the Default Vocabulary</h3>
 
   <p class="note">The values of <code>@type</code> are unordered, so if multiple
     types are listed, the order that <a>type-scoped contexts</a> are applied is based on
-    a>code point ordering</a>.</p>
+    <a>code point ordering</a>.</p>
 
   <p>For example, consider the following semantically equivalent examples.
     The first example, shows how properties and types can define their own