grolbp --version (return code: 0)
GNU grolbp (groff) version 1.22.3
grolbp --help (return code: 0)
usage: grolbp [-lvh] [-c n] [-p paper_size] [-F dir] [-o or]
[-w width] [files ...]
-o --orientation=[portrait|landscape]
-v --version
-c --copies=numcopies
-l --landscape
-p --papersize=paper_size
-w --linewidth=width
-F --fontdir=dir
-h --help