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)

merge: warning: conflicts during merge
merging a
merging a failed!
e7fe8eb3e180+0d24b7662d3e+ tip
something else
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something
M a