===================================================================
RCS file: /cvs/mandoc/regress/mdoc/Ud/arg.out_lint,v
retrieving revision 1.4
retrieving revision 1.5
diff -u -p -r1.4 -r1.5
--- mandoc/regress/mdoc/Ud/arg.out_lint	2017/06/17 22:45:15	1.4
+++ mandoc/regress/mdoc/Ud/arg.out_lint	2017/06/25 12:53:21	1.5
@@ -1,4 +1,5 @@
-mandoc: arg.in:1:5: STYLE: Mdocdate missing: Dd January
+mandoc: arg.in:3:5: BASE: operating system explicitly specified: Os OpenBSD (OpenBSD)
+mandoc: arg.in:1:5: BASE: Mdocdate missing: Dd January (OpenBSD)
 mandoc: arg.in:9:2: STYLE: useless macro: Ud
 mandoc: arg.in:11:2: STYLE: useless macro: Bt
 mandoc: arg.in:15:2: STYLE: useless macro: Ud
@@ -9,4 +10,4 @@ mandoc: arg.in:17:2: STYLE: useless macro: Ud
 mandoc: arg.in:17:2: ERROR: skipping all arguments: Ud one
 mandoc: arg.in:18:2: STYLE: useless macro: Bt
 mandoc: arg.in:18:2: ERROR: skipping all arguments: Bt one
-mandoc: arg.in: STYLE: RCS id missing
+mandoc: arg.in: BASE: RCS id missing: (OpenBSD)