When editing source files checked out from CVS I sometimes want to prevent them from going back in to source control without further edits. Until now I've just used // FIXME comments and have tried to remember to grep for FIXMEs before committing the files back.
Problem is others use FIXME comments, and sometimes I forget to grep. So I've tweaked our CVSROOT files to prevent custom FIXME tags from going in to source control.