message: Fixed a spelling error that broke the GANEstimator documentation example
  Fixed a spelling error that broke the tfgan.estimator.GANEstimator documentation example
diff: @@ -88,8 +88,8 @@ class GANEstimator(estimator.Estimator):
  discriminator_fn=discriminator_fn,
  generator_loss_fn=tfgan.losses.wasserstein_generator_loss,
  discriminator_loss_fn=tfgan.losses.wasserstein_discriminator_loss,
  - generator_optimizer=tf.train.AdamOptimizier(0.1, 0.5),
  - discriminator_optimizer=tf.train.AdamOptimizier(0.1, 0.5))
  + generator_optimizer=tf.train.AdamOptimizer(0.1, 0.5),
  + discriminator_optimizer=tf.train.AdamOptimizer(0.1, 0.5))
  # Train estimator.
  gan_estimator.train(train_input_fn, steps)
  