message: [tf.data] Make error message more informative.
diff: @@ -56,7 +56,9 @@ class OptionsBase(object):
  def __setattr__(self, name, value):
  if not self._mutable:
  raise ValueError("Mutating `tf.data.Options()` returned by "
  - "`tf.data.Dataset.options()` has no effect.")
  + "`tf.data.Dataset.options()` has no effect. Use "
  + "`tf.data.Dataset.with_options(options)` to set or "
  + "update dataset options.")
  if hasattr(self, name):
  object.__setattr__(self, name, value)
  else:
  