message: Allow "." in list item names of Args/Returns/Raises blocks
  Blocks like this:
  Raises:
  tf.errors.OpError: Or one of its subclasses if an error occurs while
  creating the TensorFlow session.
  TypeError: If one of the arguments has the wrong type.
  "tf.errors.OpError" is now parsed into a list item.
diff: @@ -507,7 +507,7 @@ def _parse_function_details(docstring):
  pairs = list(_gen_pairs(parts[1:]))
  function_details = []
  - item_re = re.compile(r'^ ? ?(\*?\*?\w+\s*):\s', re.MULTILINE)
  + item_re = re.compile(r'^ ? ?(\*?\*?\w[\w.]*?\s*):\s', re.MULTILINE)
  for keyword, content in pairs:
  content = item_re.split(content)
  