Markup nits.

share/man/man4/sab.4

@@ -1,4 +1,3 @@
-.\"	$FreeBSD$
 .\"	$OpenBSD: sab.4,v 1.6 2003/06/06 10:29:42 jmc Exp $
 .\"
 .\" Copyright (c) 2001 Jason L. Wright (jason@thought.net)
@@ -25,6 +24,8 @@
 .\" ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 .\" POSSIBILITY OF SUCH DAMAGE.
 .\"
+.\" $FreeBSD$
+.\"
 .Dd October 29, 2001
 .Dt SAB 4 sparc64
 .Os
@@ -53,15 +54,18 @@ driver supports all of the standard
 .Xr tty 4
 ioctl calls.
 The status of the DTR, RTS, CTS, and DCD signals can be queried with
-TIOCMGET command, but, due to limitations in the hardware,
-only the DTR and RTS signals can be modified with TIOCMSET, TIOCMBIC,
-and TIOCMBIS
+.Dv TIOCMGET
+command, but, due to limitations in the hardware,
+only the DTR and RTS signals can be modified with
+.Dv TIOCMSET , TIOCMBIC ,
+and
+.Dv TIOCMBIS
 .Xr ioctl 2
 commands.
 .Sh FILES
-.Bl -tag -width /dev/ttyh[0-1] -compact
-.It /dev/tty[a-b]
-Serial ports
+.Bl -tag -width ".Pa /dev/tty[a-b]" -compact
+.It Pa /dev/tty[a-b]
+Serial ports.
 .El
 .Sh SEE ALSO
 .Xr ioctl 2 ,
@@ -75,4 +79,6 @@ driver first appeared in
 .Sh BUGS
 The
 .Nm
-does not support cua minor devices.
+does not support
+.Pa cua
+minor devices.