message: Fixed wrong variable name in example
  The Keras model used a wrong variable name in the MirroredStrategy example
diff: @@ -76,7 +76,7 @@ We then compile the Keras model and pass the `MirroredStrategy` object in the
  ```python
  model.compile(loss='mean_squared_error',
  optimizer=tf.train.GradientDescentOptimizer(learning_rate=0.2),
  - distribute=strategy)
  + distribute=distribution)
  ```
  To train the model we call Keras `fit` API using the input dataset that we
  