message: [tf.data] Minor fix to remove unnecessary difference between the implementations of the batch and padded batch reducers.
diff: @@ -272,9 +272,9 @@ def _padded_batch_dense_window(dataset, padded_shape, padding_value=None):
  padding_value = 0
  def batch_init_fn(_):
  - return array_ops.fill(
  - array_ops.concat([np.array([0], dtype=np.int32), padded_shape], 0),
  - constant_op.constant(padding_value, dtype=dataset.output_types))
  + batch_shape = array_ops.concat(
  + [np.array([0], dtype=np.int32), padded_shape], 0)
  + return gen_array_ops.empty(batch_shape, dtype=dataset.output_types)
  def batch_reduce_fn(state, value):
  return array_ops.concat([state, [value]], 0)
  