Changes by: Aleksey Nogin (nogin at metaprl.org)
Date: 2007-05-29 09:43:51 -0700 (Tue, 29 May 2007)
Revision: 10825
Log message:

      - Added the replace_nth function (merges rev 10818 from 0.9.8.x)
     
     - Include the function name in the "index is out of bounds" messages for nth
       and replace-nth.