docs: def pg_ctl(self, cmd, *args, **kwargs):
          """Builds and executes pg_ctl command
  
          :returns: `!True` when return_code == 0, otherwise `!False`"""
  
          pg_ctl = [self._pgcommand('pg_ctl'), cmd]
          return subprocess.call(pg_ctl + ['-D', self._data_dir] + list(args), **kwargs) == 0