Changes by: Jason Hickey (jyh at cs.caltech.edu)
Date: 2006-03-17 19:33:20 -0800 (Fri, 17 Mar 2006)
Revision: 8930
Log message:

      Minor touchup on Aleksey's fix.
      
      I think the signature code for Rule/Rewrite/CondRewrite
      are premature, but no big deal currently.  Was there some
      other intent here?