Fix some macro usage. Fix a typo.

usr.bin/systat/systat.1

@@ -1,4 +1,4 @@
-.\"	$NetBSD: systat.1,v 1.50 2018/12/26 01:54:09 sevan Exp $
+.\"	$NetBSD: systat.1,v 1.51 2018/12/28 12:21:53 wiz Exp $
 .\"
 .\" Copyright (c) 1985, 1990, 1993
 .\"	The Regents of the University of California.  All rights reserved.
@@ -67,9 +67,7 @@ Other displays show more detailed process information,
 swap space usage,
 disk usage statistics (a la
 .Xr df 1 ) ,
-disk
-.Tn I/O
-statistics (a la
+disk I/O statistics (a la
 .Xr iostat 8 ) ,
 virtual memory statistics (a la
 .Xr vmstat 1 ) ,
@@ -276,7 +274,6 @@ interfaces, all
 .Ic bge
 interfaces and the loopback interface.
 .El
-.Pp
 .It Ic inet.icmp
 Display ICMP statistics.
 .It Ic inet.ip
@@ -284,9 +281,7 @@ Display IPv4 and UDP statistics.
 .It Ic inet.tcp
 Display TCP statistics.
 .It Ic inet.tcpsyn
-Display statistics about the
-.Tn TCP
-``syncache''.
+Display statistics about the TCP ``syncache''.
 .It Ic inet6.ip6
 Display IPv6 statistics.
 .It Ic iostat
@@ -309,15 +304,11 @@ display; the minimum unambiguous prefix may be supplied.
 .Pp
 .Bl -tag -width Fl -compact
 .It Cm numbers
-Show the disk
-.Tn I/O
-statistics in numeric form.
+Show the disk I/O statistics in numeric form.
 Values are
 displayed in numeric columns which scroll downward.
 .It Cm bars
-Show the disk
-.Tn I/O
-statistics in bar graph form (default).
+Show the disk I/O statistics in bar graph form (default).
 .It Cm secs
 Toggle the display of time in disk activity (the default is to
 not display time).
@@ -447,9 +438,7 @@ the syscall.
 .It Ic vmstat
 Take over the entire display and show a (rather crowded) compendium
 of statistics related to virtual memory usage, process scheduling,
-device interrupts, system name translation caching, disk
-.Tn I/O
-etc.
+device interrupts, system name translation caching, disk I/O etc.
 .Pp
 The upper left quadrant of the screen shows the number
 of users logged in and the load average over the last one, five,
@@ -527,40 +516,50 @@ Below the paging statistics is another columns of paging data.
 From top to bottom, these represent:
 .Pp
 .Bl -tag -width Fl -compact
-.It Ic Sq forks
-number of fork() calls
-.It Ic Sq fkppw
-number of fork() calls where parent waits
-.It Ic Sq fksvm
-number of fork() calls where vmspace is shared
-.It Ic Sq pwait
+.It Sq Ic forks
+number of
+.Fn fork
+calls
+.It Sq Ic fkppw
+number of
+.Fn fork
+calls where parent waits
+.It Sq Ic fksvm
+number of
+.Fn fork
+calls where vmspace is shared
+.It Sq Ic pwait
 number of times fault had to wait on a page
-.It Ic Sq relck
-number of times uvmfault_relock() is called
-.It Ic Sq rlkok
-number of times uvmfault_relock() is a success
-.It Ic Sq noram
+.It Sq Ic relck
+number of times
+.Fn uvmfault_relock
+is called
+.It Sq Ic rlkok
+number of times
+.Fn uvmfault_relock
+is a success
+.It Sq Ic noram
 number of times fault was out of RAM
-.It Ic Sq ndcpy
+.It Sq Ic ndcpy
 number of times fault clears ``needs copy''
-.It Ic Sq fltcp
+.It Sq Ic fltcp
 number of times fault promotes with copy (2b)
-.It Ic Sq zfod
+.It Sq Ic zfod
 number of times fault promotes with zerofill (2b)
-.It Ic Sq cow
+.It Sq Ic cow
 number of times faulted for anonymous for Copy-On-Write (case 1b)
-.It Ic Sq fmin
+.It Sq Ic fmin
 min number of free pages
-.It Ic Sq ftarg
+.It Sq Ic ftarg
 target number of free pages
-.It Ic Sq itarg
+.It Sq Ic itarg
 target number of inactive pages
-.It Ic Sq flnan
+.It Sq Ic flnan
 number of times fault was out of anonymous pages
-.It Ic Sq pdfre
+.It Sq Ic pdfre
 number of pages daemon freed since boot
-.It Ic Sq pdscn
-number of pages daemon scaned since boot
+.It Sq Ic pdscn
+number of pages daemon scanned since boot
 .El
 .Pp
 Note that the `%zfod' percentage is usually less than 100%,