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
016807e6fdaf tip
eb43f19ff115
eb43f19ff115+
reverting file1
? file1.orig
eb43f19ff115
? file1.orig
016807e6fdaf tip
merging file1
? file1.orig
016807e6fdaf tip
? file1.orig
016807e6fdaf tip
? file1.orig
016807e6fdaf tip
? file1.orig
016807e6fdaf tip