code: def wrap_str_of(self, text):
          
          text_repr = ascii(text)
          internal_assert(text_repr[0] == text_repr[-1] and text_repr[0] in ("'", '"'), "cannot wrap str of", text)
          return self.wrap_str(text_repr[1:-1], text_repr[-1])
docs: Wrap a string of a string.