A bit of cleanup.

usr.sbin/chkgrp/chkgrp.8

@@ -28,15 +28,17 @@
 .\"
 .Dd May 5, 1998
 .Dt CHKGRP 8
-.Os
+.Os FreeBSD
 .Sh NAME
 .Nm chkgrp
 .Nd check the syntax of the group file
 .Sh SYNOPSIS
-.Nm chkgrp
+.Nm
 .Op Ar groupfile
 .Sh DESCRIPTION
-.Nm Chkgrp
+The
+.Nm
+utility
 scans the given file or, failing that, the system-wide group file for
 errors.
 Specifically, it checks that every non-blank, non-comment
@@ -58,18 +60,20 @@ scanned and the line number on which the error was found.
 Otherwise no
 output is produced.
 .Pp
-.Nm Chkgrp
-returns EX_DATAERR if errors were found in the group file, and EX_OK
-otherwise.
+The
+.Nm
+utility returns EX_DATAERR if errors were found in the group file,
+and EX_OK otherwise.
 .Sh HISTORY
 The
 .Nm
-command appeared in
-.Fx 3.0
+utility appeared in
+.Fx 3.0 .
 .Sh AUTHORS
-.Nm Chkgrp
-and this manual page were written by
+The
+.Nm
+utility and this manual page were written by
 .An Dag-Erling Coïdan Smørgav Aq des@FreeBSD.org .
 .Sh BUGS
-Should check fields more thoroughly for allowed / disallowed
+Should check fields more thoroughly for allowed/disallowed
 characters, and the range of the group ID.