cp(1): fix -P documentation to reflect it works without -R

Since commit 97e1303791, the -P flag works without -R as
required by POSIX. Update the man page to state that only -H
and -L are ignored without -R, while -P can be used independently.

PR: 289959
Signed-off-by: Kit Dallege <xaum.io@gmail.com>
Reviewed by: imp
Pull Request: https://github.com/freebsd/freebsd-src/pull/2102

bin/cp/cp.1

@@ -29,7 +29,7 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.Dd July 9, 2025
+.Dd June 9, 2026
 .Dt CP 1
 .Os
 .Sh NAME
@@ -247,14 +247,17 @@ flags (in conjunction with the
 .Fl R
 flag) cause symbolic links to be followed as described above.
 The
-.Fl H ,
+.Fl H
-.Fl L
 and
-.Fl P
+.Fl L
 options are ignored unless the
 .Fl R
 option is specified.
-In addition, these options override each other and the
+The
+.Fl P
+option can be used with or without
+.Fl R .
+These options override each other and the
 command's actions are determined by the last one specified.
 .Pp
 If