afmtodit(1) on Linux
The text 575b535d7c06, as Debian 11 (Bullseye) shipped it.
create font files for use with groff -Tps and -Tpdf
Flags it lists
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-a -
-c -
-d -
-e -
-f -
-i -
-k -
-m -
-n -
-o -
-s -
-v -
-x