message: fix "line too long"
diff: @@ -699,11 +699,12 @@ class DatasetV2(tracking_base.Trackable, composite_tensor.CompositeTensor):
  def prefetch(self, buffer_size):
  """Creates a `Dataset` that prefetches elements from this dataset.
  - Note: Like other `Dataset` methods, prefetch operates on the elements of
  - the dataset. It has no concept of examples vs. batches. `examples.prefetch(2)`
  - will prefetch two elements (2 examples), while `examples.batch(20).prefetch(2)`
  - will prefetch 2 elements (2 batches, of 20 examples each). The typical
  - use-case is to `prefetch` batches.
  + Note: Like other `Dataset` methods, prefetch operates on the
  + elements of the dataset. It has no concept of examples vs. batches.
  + `examples.prefetch(2)` will prefetch two elements (2 examples),
  + while `examples.batch(20).prefetch(2)` will prefetch 2 elements
  + (2 batches, of 20 examples each). The typical use-case is to
  + `prefetch` batches.
  Args:
  buffer_size: A `tf.int64` scalar `tf.Tensor`, representing the maximum
  