usage: /usr/bin/grotty [-dfhot] [-i|-r] [-F font-directory] [file ...]
usage: /usr/bin/grotty -c [-bBdfhouU] [-F font-directory] [file ...]
usage: /usr/bin/grotty {-v | --version}
usage: /usr/bin/grotty --help

Translate the output of troff(1) into a form suitable for
typewriter‐like devices, including terminal emulators.  See the
grotty(1) manual page.