Don't abort when backup files already exist. Don't allow alternative names. Rationale: - When the user wants to revert, he shouldn't be stopped from doing this just because some old backups will be overwritten. - To not clobber important files by accident, alternative names for backup files were disabled. As the backup target now has a fixed name, the user doesn't have to be informed about the backup copy (unless --verbose)

Make 'hg tags -q' only list tag names without revision numbers and hashes, and change bash_completion to use this.

add --options to debugcomplete and change bash_completion to use it make debugcomplete print one item per line (this is not needed for the bash_completion script, but should be easier to use in other scripts)