Note: help and version output are generated by a naïve script which tries a few variants of
<command> --help, <command> -h etc. to find the command's help and version info.
Sometimes it gets lucky, sometimes it doesn't; if the output below looks wrong, it probably is.
refer --version (return code: 0)
GNU refer (groff) version 1.22.3
refer --help (return code: 0)
usage: refer [-benvCPRS] [-aN] [-cXYZ] [-fN] [-iXYZ] [-kX] [-lM,N] [-p file]
[-sXYZ] [-tN] [-BL.M] [files ...]