Add missing \n for "invalid optionusage" output

Reviewed-by: Brian Behlendorf <[email protected]>
Reviewed-by: DHE <[email protected]>
Reviewed-by: George Melikov <[email protected]>
Reviewed-by: Giuseppe Di Natale <[email protected]>
Reviewed-by: Jack Draak <[email protected]>
Signed-off-by: Kash Pande <[email protected]>
Closes #6203

cmd/zfs/zfs_main.c

@@ -4149,7 +4149,7 @@ zfs_do_receive(int argc, char **argv)
 	if (abort_resumable) {
 		if (flags.isprefix || flags.istail || flags.dryrun ||
 		    flags.resumable || flags.nomount) {
-			(void) fprintf(stderr, gettext("invalid option"));
+			(void) fprintf(stderr, gettext("invalid option\n"));
 			usage(B_FALSE);
 		}