Merge branch 'rj/prune-packed-excess-args'

"git prune-packed" did not notice and complain against excess
arguments given from the command line, which now it does.

* rj/prune-packed-excess-args:
  prune-packed: check for too many arguments

builtin/prune-packed.c

@@ -63,6 +63,11 @@ int cmd_prune_packed(int argc, const char **argv, const char *prefix)
 	argc = parse_options(argc, argv, prefix, prune_packed_options,
 			     prune_packed_usage, 0);
 
+	if (argc > 0)
+		usage_msg_opt(_("too many arguments"),
+			      prune_packed_usage,
+			      prune_packed_options);
+
 	prune_packed_objects(opts);
 	return 0;
 }