Add #334 to History

Author: drbrain

History.rdoc

@@ -18,6 +18,8 @@
     Evans.
   * Added RDoc::RI::Task for building ri data easily through rake.  Pull
     request #332 by Zachary Scott.
+  * A gzipped search index is generated for servers configured to use
+    precompressed files.  Pull request #334 by Zachary Scott.
 
 * Bug fixes
   * Fixed HTML labels for cross-browser compatibility.  This breaks existing