message: Update tensorflow/python/data/ops/dataset_ops.py
diff: @@ -1632,7 +1632,7 @@ name=None))
  >>> list(d.as_numpy_iterator())
  [b'HELLO', b'WORLD']
  - Note the fact that the use of `tf.numpy_function` and `tf.py_function`
  + Note that the use of `tf.numpy_function` and `tf.py_function`
  in general precludes the possibility of executing user-defined
  transformations in parallel (because of Python GIL).
  