mandoc: B.in:36:23: WARNING: invalid escape sequence: \B'1+1
mandoc: B.in:3:5: BASE: operating system explicitly specified: Os OpenBSD (OpenBSD)
mandoc: B.in:1:5: BASE: Mdocdate missing: Dd July (OpenBSD)
mandoc: B.in: BASE: RCS id missing: (OpenBSD)