mandoc(1) on OpenBSD
The text 53f7608efaa7, as OpenBSD 6.0, OpenBSD 5.9 shipped it.
format and display UNIX manuals
Flags it lists
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-I -
-K -
-O -
-T -
-W -
-a -
-c -
-f -
-h -
-k -
-l -
-m