message: reduce line length
  moved half of line 377 onto the next line to shorten line length
diff: @@ -374,7 +374,8 @@ class MaxPooling2D(Pooling2D):
  Usage Example:
  >>> model = tf.keras.models.Sequential()
  - >>> model.add(tf.keras.layers.Conv2D(32, kernel_size=(3, 3), input_shape=(28,28,1)))
  + >>> model.add(tf.keras.layers.Conv2D(32, kernel_size=(3, 3),
  + ... input_shape=(28,28,1)))
  >>> model.add(tf.keras.layers.MaxPooling2D(pool_size=(2, 2)))
  For example, for stride=(1,1) and padding="same":
  