bsdinstall(8): fix manpage issues

- Start new sentences on new lines.
- Separate e.g. (more of an igor thing) with commas, and rewrite some examples
  not to be enclosed in parentheses.

Reported by:	igor, make manlint
MFC after:	2 weeks
Sponsored by:	Dell EMC Isilon

usr.sbin/bsdinstall/bsdinstall.8

@@ -25,7 +25,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd October 31, 2014
+.Dd May 23, 2017
 .Dt BSDINSTALL 8
 .Os
 .Sh NAME
@@ -39,17 +39,18 @@
 .Sh DESCRIPTION
 .Nm
 is used for installation of new systems, both for system setup from
-installation media (e.g. CD-ROMs) and for use on live systems to prepare
+installation media, e.g., CD-ROMs, and for use on live systems to prepare
 VM images and jails.
 .Pp
 Much like
 .Xr make 1 , Nm
-takes a target and possible parameters of the target as arguments. If
+takes a target and possible parameters of the target as arguments.
-invoked with no arguments, it will invoke the
+If invoked with no arguments, it will invoke the
 .Cm auto
 target, which provides a standard interactive installation, invoking the
-others in sequence. To perform a scripted installation, these subtargets
+others in sequence.
-can be invoked separately by an installation script.
+To perform a scripted installation,
+these subtargets can be invoked separately by an installation script.
 .Sh OPTIONS
 .Nm
 supports the following options, global to all targets:
@@ -115,7 +116,8 @@ If
 is set, also configures the network interfaces of the current system to match.
 .It Cm autopart
 Provides the installer's interactive guided disk partitioner for single-disk
-installations. Defaults to UFS.
+installations.
+Defaults to UFS.
 .It Cm zfsboot
 Provides an alternative ZFS-only automatic interactive disk partitioner.
 Creates a single
@@ -135,8 +137,8 @@ to encrypt the disk.
 Provides the installer's interactive manual disk partitioner with an interface
 identical to
 .Xr sade 8 .
-Supports multiple disks as well as UFS, ZFS, and FAT file systems. ZFS
+Supports multiple disks as well as UFS, ZFS, and FAT file systems.
-is set up with one pool and dataset per partition.
+ZFS is set up with one pool and dataset per partition.
 .It Cm scriptedpart Ar parameters
 Sets up disks like
 .Cm autopart
@@ -150,14 +152,16 @@ Each disk setup is specified by a three-part argument:
 .Op Ar scheme
 .Op Ar {partitions}
 .Pp
-Multiple disk setups are separated by semicolons. The
+Multiple disk setups are separated by semicolons.
+The
 .Ar disk
 argument specifies the disk on which to operate (which will be erased),
 while the
 .Ar scheme
 argument specifies the
 .Xr gpart 8
-partition scheme to apply to the disk. If
+partition scheme to apply to the disk.
+If
 .Ar scheme
 is unspecified,
 .Cm scriptedpart
@@ -167,7 +171,8 @@ The
 argument is also optional and specifies how to partition
 .Ar disk .
 It consists of a comma-separated list of partitions to create enclosed in
-curly braces. Each partition declaration takes the form
+curly braces.
+Each partition declaration takes the form
 .Pp
 .Ar size
 .Ar type
@@ -178,15 +183,17 @@ specifies the partition size to create in bytes (K, M, and G suffixes
 can be appended to specify kilobytes, megabytes, and gigabytes respectively),
 while the
 .Em auto
-keyword causes the partition to take all the remaining space on the disk. The
+keyword causes the partition to take all the remaining space on the disk.
+The
 .Ar type
 option chooses the
 .Xr gpart 8
-filesystem type (e.g. freebsd-ufs, freebsd-zfs, or freebsd-swap).
+filesystem type, e.g., freebsd-ufs, freebsd-zfs, or freebsd-swap.
 The optional
 .Ar mount point
 argument sets where the created partition is to be mounted in the installed
-system. As an example, a typical invocation looks like:
+system.
+As an example, a typical invocation looks like:
 .Pp
 bsdinstall scriptedpart ada0 { 20G freebsd-ufs /, 4G freebsd-swap, 20G freebsd-ufs /var, auto freebsd-ufs /usr }
 .Pp
@@ -238,37 +245,43 @@ Reads a small amount of data from
 .Pa /dev/random
 and stores it in a file in the new system's root directory.
 .It Cm config
-Installs the configuration files destined for the new system (e.g. rc.conf
+Installs the configuration files destined for the new system, e.g.,
+.Xr rc.conf 5
 fragments generated by
 .Cm netconfig ,
 etc.) onto the new system.
 .El
 .Sh ENVIRONMENT VARIABLES
 The following environment variables control various aspects of the installation
-process. Many are used internally during installation and have reasonable
+process.
-default values for most installation scenarios. Others are set by various
+Many are used internally during installation and have reasonable default values
-interactive user prompts, and can be usefully overridden when making scripted
+for most installation scenarios.
-or customized installers.
+Others are set by various interactive user prompts, and can be usefully
+overridden when making scripted or customized installers.
 .Bl -tag -width ".Ev BSDINSTALL_DISTSITE"
 .It Ev DISTRIBUTIONS
-The set of distributions to install (e.g. "base kernel ports"). Default: none
+The set of distributions to install, e.g., "base kernel ports".
+Default: none
 .It Ev BSDINSTALL_DISTDIR
 The directory in which the distribution files can be found (or to which they
-should be downloaded). Default:
+should be downloaded).
+Default:
 .Pa /usr/freebsd-dist
 .It Ev BSDINSTALL_DISTSITE
 URL from which the distribution files should be downloaded if they are not
 already present in the directory defined by
 .Ev BSDINSTALL_DISTDIR .
 This should be a full path to the files, including architecture and release
-names. Most targets (e.g.
+names.
+Most targets, e.g.,
 .Cm auto
 and
-.Cm jail )
+.Cm jail ,
 that prompt for a
 .Fx
 mirror will skip that step if this variable is already defined in the
-environment. Example:
+environment.
+Example:
 .Pa ftp://ftp.freebsd.org/pub/FreeBSD/releases/powerpc/powerpc64/9.1-RELEASE
 .It Ev BSDINSTALL_CHROOT
 The directory into which the distribution files should be unpacked and the
@@ -276,23 +289,26 @@ directory at which the root file system of the new system should be mounted.
 Default:
 .Pa /mnt
 .It Ev BSDINSTALL_LOG
-Path to a log file for the installation. Default:
+Path to a log file for the installation.
+Default:
 .Pa /tmp/bsdinstall_log
 .It Ev BSDINSTALL_TMPETC
 Directory where files destined for the new system's
 .Pa /etc
 will be stored until the
 .Cm config
-target is executed. If this directory does not already exist, it will be
+target is executed.
-created. Default:
+If this directory does not already exist, it will be created.
+Default:
 .Pa /tmp/bsdinstall_etc
 .It Ev BSDINSTALL_TMPBOOT
 Directory where files destined for the new system's
 .Pa /boot
 will be stored until the
 .Cm config
-target is executed. If this directory does not already exist, it will be
+target is executed.
-created. Default:
+If this directory does not already exist, it will be created.
+Default:
 .Pa /tmp/bsdinstall_boot
 .El
 .Sh SCRIPTING
@@ -307,8 +323,9 @@ a shell script run under
 .Xr chroot 8
 in the newly installed system before
 .Nm
-exits. The two parts are separated by the usual script header (#!), which
+exits.
-also sets the interpreter for the setup script.
+The two parts are separated by the usual script header (#!), which also sets
+the interpreter for the setup script.
 .Pp
 A typical bsdinstall script looks like this:
 .Bd -literal -offset indent
@@ -326,19 +343,21 @@ On
 release media, such a script placed at
 .Pa /etc/installerconfig
 will be run at boot time and the system will be rebooted automatically after
-the installation has completed. This can be used for unattended network
+the installation has completed.
-installation of new systems; see
+This can be used for unattended network installation of new systems; see
 .Xr diskless 8
 for details.
 .Ss PREAMBLE
-The preamble consists of installer settings. These control global installation
+The preamble consists of installer settings.
-parameters (see
+These control global installation parameters (see
 .Sx ENVIRONMENT VARIABLES )
-as well as disk partitioning. The preamble is interpreted as a
+as well as disk partitioning.
+The preamble is interpreted as a
 .Xr sh 1
-script run at the very beginning of the install. If more complicated behavior
+script run at the very beginning of the install.
-than setting these variables is desired, arbitrary commands can be run here
+If more complicated behavior than setting these variables is desired,
-to extend the installer. In addition to the variables in
+arbitrary commands can be run here to extend the installer.
+In addition to the variables in
 .Sx ENVIRONMENT VARIABLES ,
 in particular
 .Ev DISTRIBUTIONS ,
@@ -358,13 +377,14 @@ instead of
 .Ev PARTITIONS .
 .Ss SETUP SCRIPT
 Following the preamble is an optional shell script, beginning with a #!
-declaration. This script will be run at the end of the installation process
+declaration.
-inside a
+This script will be run at the end of the installation process inside a
 .Xr chroot 8
 environment in the newly installed system and can be used to set up
-configuration files, install packages, etc. Note that newly configured
+configuration files, install packages, etc.
-system services (e.g. networking) have not been started in the installed
+Note that newly configured system services, e.g., networking have not
-system at this time and only installation host services are available.
+been started in the installed system at this time and only installation
+host services are available.
 .Sh HISTORY
 This version of
 .Nm