message: Put some emphasis on incrementing global step
  Pruning will not work if the global step is not incremented
diff: @@ -103,6 +103,7 @@ with tf.graph.as_default():
  mon_sess.run(mask_update_op)
  ```
  +Ensure that `global_step` is being [incremented](https://www.tensorflow.org/api_docs/python/tf/train/Optimizer#minimize), otherwise pruning will not work!
  ## Example: Pruning and training deep CNNs on the cifar10 dataset
  