regress/mdoc/Sh/empty.out_lint

   1 mandoc: empty.in:9:2: ERROR: inserting missing end of block: Sh breaks Xo
   2 mandoc: empty.in:3:5: BASE: operating system explicitly specified: Os OpenBSD (OpenBSD)
   3 mandoc: empty.in:1:5: BASE: Mdocdate missing: Dd November (OpenBSD)
   4 mandoc: empty.in: BASE: RCS id missing: (OpenBSD)