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)

1:016807e6fdaf
0:eb43f19ff115
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eb43f19ff115
eb43f19ff115+
reverting file1
? file1.orig
eb43f19ff115
? file1.orig
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merging file1
? file1.orig
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? file1.orig
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? file1.orig
016807e6fdaf tip
? file1.orig
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