code: def list(self, rule, **kwargs):
          
          return '<ul class="pynspect-rule-list">{}</ul>'.format(''.join(['<li class="pynspect-rule-list-item">{}</li>'.format(v.traverse(self, **kwargs)) for v in rule.value]))
docs: Callback method for rule tree traversing. Will be called at proper time
          from :py:class:`pynspect.rules.ListRule.traverse` method.
  
          :param pynspect.rules.Rule rule: Reference to rule.
          :param dict kwargs: Optional callback arguments.