message: Fix formatting in image_flip_left_right
diff: @@ -383,6 +383,7 @@ def random_flip_left_right(image, seed=None):
  [[[2], [1]], [[4], [3]]]
  Randomly flip multiple images.
  +
  >>> images = np.array(
  ... [
  ... [[[1], [2]], [[3], [4]]],
  