===================================================================
RCS file: /cvs/mandoc/regress/regress.pl.1,v
retrieving revision 1.3
retrieving revision 1.5
diff -u -p -r1.3 -r1.5
--- mandoc/regress/regress.pl.1	2017/07/18 18:47:06	1.3
+++ mandoc/regress/regress.pl.1	2020/03/13 15:32:31	1.5
@@ -1,6 +1,6 @@
-.\"	$Id: regress.pl.1,v 1.3 2017/07/18 18:47:06 schwarze Exp $
+.\"	$Id: regress.pl.1,v 1.5 2020/03/13 15:32:31 schwarze Exp $
 .\"
-.\" Copyright (c) 2017 Ingo Schwarze <schwarze@openbsd.org>
+.\" Copyright (c) 2017, 2019, 2020 Ingo Schwarze <schwarze@openbsd.org>
 .\"
 .\" Permission to use, copy, modify, and distribute this software for any
 .\" purpose with or without fee is hereby granted, provided that the above
@@ -14,7 +14,7 @@
 .\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 .\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 .\"
-.Dd $Mdocdate: July 18 2017 $
+.Dd $Mdocdate: March 13 2020 $
 .Dt REGRESS.PL 1
 .Os
 .Sh NAME
@@ -78,6 +78,8 @@ output mode.
 Run subtests for
 .Fl T Cm markdown
 output mode.
+.It Cm tag
+Run subtests for automatic and manual tagging.
 .It Cm utf8
 Run subtests for
 .Fl T Cm utf8
@@ -145,3 +147,12 @@ The
 subdirectory of the regression suite is not included.
 It uses a Makefile structure that differs vastly from the
 rest of the suite.
+.Sh BUGS
+The C library function
+.Xr wcwidth 3
+is known to be buggy on Solaris, which may cause failures in the
+regression suite, usually because output lines containing affected
+Unicode characters wrap too early.
+.Pp
+The regression suite does not work at all on Solaris 10 or earlier
+because the Perl interpreter provided with those systems is too old.