rcsclean --version (return code: 0)
rcsclean (GNU RCS) 5.9.4 Copyright (C) 2010-2015 Thien-Thi Nguyen Copyright (C) 1990-1995 Paul Eggert Copyright (C) 1982,1988,1989 Walter F. Tichy, Purdue CS License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.
rcsclean --help (return code: 0)
Usage: rcsclean [options] file ... Clean up working files. Options: -r[REV] Specify revision. -u[REV] Unlock if is locked and no differences found. -n[REV] Dry run (no act, don't operate). -q[REV] Quiet mode. -kSUBST Substitute using mode SUBST (see co(1)). -T Preserve the modification time on the RCS file even if it changes because a lock is removed. -V Obsolete; do not use. -VN Emulate RCS version N. -xSUFF Specify SUFF as a slash-separated list of suffixes used to identify RCS file names. -zZONE Specify date output format in keyword-substitution. REV defaults to the latest revision on the default branch. Report bugs to: <email@example.com> RCS home page: <http://www.gnu.org/software/rcs/> General help using GNU software: <http://www.gnu.org/gethelp/>