mandoc: noarg.in:11:2: WARNING: skipping empty macro: In
mandoc: noarg.in:18:2: WARNING: skipping empty macro: In
mandoc: noarg.in:3:5: BASE: operating system explicitly specified: Os OpenBSD (OpenBSD)
mandoc: noarg.in:1:5: BASE: Mdocdate missing: Dd February (OpenBSD)
mandoc: noarg.in:15:11: STYLE: no blank before trailing delimiter: In math.h:
mandoc: noarg.in: BASE: RCS id missing: (OpenBSD)