docs: def super_psql(self, args):
          """Just like .psql(), except that we connect as the database superuser
          (and we connect to the superuser's database, not the user's database).
          """
          argv = [
              PostgresFinder.find_root() / 'psql',
              '--quiet',
              '-U', self.superuser,
              '-h', self.host,
              '-p', self.port,
          ] + args
          subprocess.check_call(argv)