merge: avoid to break the dirstate copy status on moved files In the case a file is locally tracked as copied in dirstate, and that a merge affects this file, this file should not be marked as modified in dirstate, as this will break the current copy state. Note: only affect working directory merge, not branch merge.

commands: initial audit of exit codes bisect: clarify None return bundle: return 1 on no changes clone: return result code copy: limit errors to 0/1 commit: return 1 on no changes forget: return 1 on errors grep: return 1 if no match found remove: return 1 on errors resolve: return 1 if something fails to resolve rollback: return 1 if no rollback data