lexgrog(1) on Linux
The text d170bc5174b2, as Debian 6.0 (Squeeze) shipped it.
parse header information in man pages
Flags it lists
-
--cat -
--encoding -
--filters -
--help -
--man -
--version -
--whatis -
-E -
-V -
-c -
-f -
-h -
-m -
-w