mandoc: badarg.in:1:2: WARNING: cannot parse date, using it verbatim: bad date
mandoc: badarg.in:3:5: BASE: operating system explicitly specified: Os OpenBSD (OpenBSD)
mandoc: badarg.in:1:5: BASE: Mdocdate missing: Dd bad date (OpenBSD)
mandoc: badarg.in: BASE: RCS id missing: (OpenBSD)