Close HTML tag properly.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@157533 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/LanguageExtensions.html b/docs/LanguageExtensions.html
index b8e24e3..92db81f 100644
--- a/docs/LanguageExtensions.html
+++ b/docs/LanguageExtensions.html
@@ -660,7 +660,7 @@
 included in installed versions of the framework.</p>
 
 <!-- ======================================================================= -->
-<h2 id="availability">Availability attribute</h2
+<h2 id="availability">Availability attribute</h2>
 <!-- ======================================================================= -->
 
 <p>Clang introduces the <code>availability</code> attribute, which can