fix incorrect tag

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@105189 91177308-0d34-0410-b5e6-96231b3b80d8

docs/UsersManual.html

@@ -36,7 +36,7 @@ td {
    <ul>
    <li><a href="#diagnostics_display">Controlling How Clang Displays Diagnostics</a></li>
    <li><a href="#diagnostics_mappings">Diagnostic Mappings</a></li>
-   <li><a href="#diagnostics_categories">Diagnostic Categories</a><li>
+   <li><a href="#diagnostics_categories">Diagnostic Categories</a></li>
    <li><a href="#diagnostics_commandline">Controlling Diagnostics via Command Line Flags</a></li>
    <li><a href="#diagnostics_pragmas">Controlling Diagnostics via Pragmas</a></li>
    </ul>