Markup bits.

Approved by:	re (blanket)

usr.bin/ipcs/ipcs.1

@@ -100,7 +100,7 @@ or the last operation on a semaphore.
 .It Fl C Ar core
 Extract values associated with the name list from the specified
 core instead of the default
-.Dq Pa /dev/kmem .
+.Pa /dev/kmem .
 Implies
 .Fl y .
 .It Fl M
@@ -108,7 +108,7 @@ Display system information about shared memory.
 .It Fl N Ar system
 Extract the name list from the specified system instead of the
 default
-.Dq Pa /boot/kernel/kernel .
+.Pa /boot/kernel/kernel .
 Implies
 .Fl y .
 .It Fl Q

usr.bin/mt/mt.1

@@ -352,7 +352,9 @@ Extensions regarding the
 .Xr st 4
 driver appeared in
 .Bx 386 0.1
-as a separate st(1) command, and have been merged into the
+as a separate
+.Nm st
+command, and have been merged into the
 .Nm
 command in
 .Fx 2.1 .

usr.bin/stat/stat.1

@@ -119,8 +119,9 @@ When run as
 error messages are automatically suppressed.
 .It Fl f Ar format
 Display information using the specified format.
-See the FORMATS section
-for a description of valid formats.
+See the
+.Sx FORMATS
+section for a description of valid formats.
 .It Fl l
 Display output in
 .Ic ls Fl lT

usr.bin/xargs/xargs.1

@@ -194,7 +194,7 @@ The current default value for
 is 5000.
 .It Fl o
 Reopen stdin as
-.Dq /dev/tty
+.Pa /dev/tty
 in the child process before executing the command.
 This is useful if you want
 .Nm