@ -284,7 +284,7 @@ class Command(object):
if self.args:
if len(event.args) < self.args.required_length:
raise CommandError(u'Command {} requires {} arguments (`{}`) passed {}'.format(
raise CommandError(u'Command {} requires {} argument(s) (`{}`) passed {}'.format(
event.name,
self.args.required_length,
self.raw_args,