You can prevent cvs from modifying these lines by adding "-kb", that turns off keyword replacement (CVS keywords are $Id$, $Revision$, etc.). I propose to add this to the CVSROOT/cvswrappers so that is happens automatically. I think this should do it, but I am not positive about how the directory pattern will be matched:
yes, please ...
makes it much easier to see the actual differences :)
cheers ... tim