390   overwriting a expanding keywords

   391   $ hg status a

   392   M a

   393   $ cat a

   394   expand $Id: a,v ef63ca68695b 1970/01/01 00:00:00 user $

   395   foo

   396   do not process $Id:

   397   xxx $

   398   bar

   399   $ echo '$Id$' > y

   400   $ echo '$Id$' > z

   401   $ hg add y

   402   $ hg commit -Am "rollback only" z

   403   $ cat z

   404   $Id: z,v 45a5d3adce53 1970/01/01 00:00:00 test $

   405   $ hg --verbose rollback

   406   rolling back to revision 2 (undo commit)

   407   overwriting z shrinking keywords

   408 

   409 Only z should be overwritten

   410 

   411   $ hg status a y z

   412   M a

   413   A y

   414   A z

   415   $ cat z

   416   $Id$

   417   $ hg forget y z

   418   $ rm y z

   419