Remove Tn. Remove undefined .Sp. Use tagged list instead of hanging one

with .brs.

sbin/mount/mount.8

@@ -1,4 +1,4 @@
-.\"	$NetBSD: mount.8,v 1.84 2017/11/20 16:41:55 christos Exp $
+.\"	$NetBSD: mount.8,v 1.85 2017/11/20 21:59:30 wiz Exp $
 .\"
 .\" Copyright (c) 1980, 1989, 1991, 1993
 .\"	The Regents of the University of California.  All rights reserved.
@@ -191,9 +191,7 @@ flag followed by a comma separated string of options.
 The following options are available:
 .Bl -tag -width nocoredump
 .It Cm async
-All
-.Tn I/O
-to the file system should be done asynchronously.
+All I/O to the file system should be done asynchronously.
 In the event of a crash,
 .Em "it is impossible for the system to verify the integrity of data on a file system mounted with this option" .
 You should only use this option if you have an application-specific data
@@ -281,7 +279,7 @@ All cached meta-data are invalidated, superblock and summary information
 is re-read from disk, all cached inactive vnodes and file data are
 invalidated and all inode data are re-read for all active vnodes.
 .It Cm rump
-Instead of running 
+Instead of running
 .Dq mount_<fstype>
 to mount the file system, run
 .Dq rump_<fstype> .
@@ -314,7 +312,6 @@ use the
 option of
 .Xr fsck_ffs 8 .
 .Pp
-.Sp
 .Cm log
 cannot be used together with
 .Cm discard .
@@ -330,9 +327,7 @@ is still guaranteed.
 .It Cm symperm
 Recognize permission of symbolic link when reading or traversing link.
 .It Cm sync
-All
-.Tn I/O
-to the file system should be done synchronously.
+All I/O to the file system should be done synchronously.
 This is not equivalent to the normal mode in which only
 metadata is written synchronously.
 .It Cm nosync
@@ -423,10 +418,7 @@ command:
 mount -a -t nonfs,mfs
 .Ed
 .Pp
-mounts all file systems except those of type
-.Tn NFS
-and
-.Tn MFS .
+mounts all file systems except those of type NFS and MFS.
 .Pp
 .Nm
 will attempt to execute a program in
@@ -491,18 +483,14 @@ file system table
 .El
 .Sh EXAMPLES
 Some useful examples:
-.Bl -hang -offset indent -width "MS-DOS"
-.It Tn CD-ROM
-.br
+.Bl -tag -offset indent -width "MS-DOS"
+.It CD-ROM
 mount -t cd9660 -r /dev/cd0a /cdrom
-.It Tn MS-DOS
-.br
+.It MS-DOS
 mount -t msdos /dev/fd0a /floppy
-.It Tn NFS
-.br
+.It NFS
 mount -t nfs nfs-server-host:/directory/path /mount-point
-.It Tn MFS (32 megabyte)
-.br
+.It MFS (32 megabyte)
 mount -t mfs -o nosuid,-s=32m swap /tmp
 .El
 .Pp
@@ -519,11 +507,8 @@ That would allow a simple command like
 .Qq mount /cdrom
 or
 .Qq umount /cdrom
-for media using the
-.Tn ISO-9660
-file system format in the first
-.Tn CD-ROM
-drive.
+for media using the ISO-9660 file system format in the first
+CD-ROM drive.
 .Sh DIAGNOSTICS
 The error
 .Dq Operation not supported by device