Setting 'method' option to 'text' in ElementTree.write causes errors

[bocajspear1]

If the 'method' option in ElementTree.write is set to 'text', which is taken as valid input, this conditional, at line 299, is run:

 if (options.method === "text") {
    _serialize_text(sb, self._root, encoding);
  }

However, 'self', is undefined in this context, as well as 'encoding', and the function '_serialize_text' is nonexistent. Each of these will throw errors.