docs: def _gerritCmd(self, *args):
          '''Construct a command as a list of strings suitable for
          :func:`subprocess.call`.
          '''
          if self.gerrit_identity_file is not None:
              options = ['-i', self.gerrit_identity_file]
          else:
              options = []
          return ['ssh'] + options + [
              '@'.join((self.gerrit_username, self.gerrit_server)),
              '-p', str(self.gerrit_port),
              'gerrit'
          ] + list(args)