Change macro usage so it works correctly with 1.19.

usr.bin/find/find.1

@@ -1,4 +1,4 @@
-.\"	$NetBSD: find.1,v 1.44 2003/04/04 19:21:21 wiz Exp $
+.\"	$NetBSD: find.1,v 1.45 2003/06/26 17:46:36 wiz Exp $
 .\"
 .\" Copyright (c) 1990, 1993
 .\"	The Regents of the University of California.  All rights reserved.
@@ -237,8 +237,7 @@ The filename substituted for the string
 is not qualified.
 .It Xo
 .Ic -flags
-.Op Fl
-.Ns Ar flags
+.Oo Fl Oc Ns Ar flags
 .Xc
 If
 .Ar flags
@@ -397,8 +396,7 @@ are treated as normal characters and do not have to be
 matched explicitly.
 .It Xo
 .Ic -perm
-.Op Fl
-.Ns Ar mode
+.Oo Fl Oc Ns Ar mode
 .Xc
 The
 .Ar mode