mandoc: emptytag.in:3:5: BASE: operating system explicitly specified: Os OpenBSD (OpenBSD)
mandoc: emptytag.in:1:5: BASE: Mdocdate missing: Dd July (OpenBSD)
mandoc: emptytag.in:12:2: WARNING: empty head in list item: Bl -tag It
mandoc: emptytag.in: BASE: RCS id missing: (OpenBSD)