groff(1) on Linux
The text 2f04df3067a8, as Debian 13 (Trixie) shipped it.
front end to the GNU roff document formatting system
Flags it lists
-
--version -
-C -
-D -
-E -
-F -
-G -
-I -
-K -
-L -
-M -
-N -
-P -
-R -
-S -
-T -
-U -
-V -
-W -
-X -
-Z -
-a -
-b -
-c -
-d -
-e -
-f -
-g -
-i -
-j -
-k -
-l -
-m -
-n -
-o -
-p -
-r -
-s -
-t -
-v -
-w -
-z