mandoc(1) on FreeBSD
The text ab8f1d077090, as FreeBSD 13.1-RELEASE, FreeBSD 13.0-RELEASE, FreeBSD 12.3-RELEASE, FreeBSD 12.2-RELEASE, FreeBSD 12.1-RELEASE shipped it.
format manual pages
Flags it lists
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-I -
-K -
-O -
-T -
-W -
-a -
-c -
-man -
-mdoc