grotty(1) on Linux
The text b051a4be6b76, as Debian 13 (Trixie) shipped it.
groff output driver for typewriter-like (terminal) devices
Flags it lists
-
-B -
-F -
-U -
-b -
-c -
-d -
-f -
-h -
-i -
-o -
-r -
-u