-o, --output-file=FILE
write output to specified file
The results are written to standard output if no output file is specified or if it is -.
Output file location in update mode: The result is written back to def.po.
--backup=CONTROL
make a backup of def.po
--suffix=SUFFIX
override the usual backup suffix
The version control method may be selected via the --backup option or through the VERSION_CONTROL environment variable. Here are the values:
none, off
never make backups (even if --backup is given)
numbered, t
make numbered backups
existing, nil
numbered if numbered backups exist, simple otherwise
simple, never
always make simple backups
The backup suffix is `~', unless set with --suffix or the SIMPLE_BACKUP_SUFFIX environment variable.