ln(1): wordsmith -F option description

MFC after:	1 month

bin/ln/ln.1

@@ -32,7 +32,7 @@
 .\"	@(#)ln.1	8.2 (Berkeley) 12/30/93
 .\" $FreeBSD$
 .\"
-.Dd November 2, 2012
+.Dd June 12, 2017
 .Dt LN 1
 .Os
 .Sh NAME
@@ -87,14 +87,18 @@ option should be used with either
 or
 .Fl i
 options.
-If none is specified,
+If neither
+.Fl f
+nor
+.Fl i
+is specified,
 .Fl f
 is implied.
 The
 .Fl F
 option is a no-op unless
 .Fl s
-option is specified.
+is specified.
 .It Fl L
 When creating a hard link to a symbolic link,
 create a hard link to the target of the symbolic link.