clarify the explanation of -n just a bit.
SVN-Revision: 919
(i and p modes)
Set file modification time on created files to match
those in the source.
-.It Fl O Ar file
-Write archive to
-.Ar file .
.It Fl n
(i mode, only with
.Fl t )
-Display numeric uid and gid instead of looking up uname and gname.
+Display numeric uid and gid.
+By default,
+.Nm
+displays the user and group names when they are provided in the
+archive, or looks up the user and group names in the system
+password database.
+.It Fl O Ar file
+Write archive to
+.Ar file .
.It Fl o
Output mode.
See above for description.