docs: def response_text(self, status, text=None, content_type='text/plain', encoding='utf-8', headers=None):
          """
          Send a plain-text response
          """
  
          if text is None:
              if isinstance(status, str):
                  text = status
              else:
                  text = status.phrase
          return self.response(status, content_type, [text.encode(encoding)], headers=headers)