message: Delete a duplicated space in comment.
diff: @@ -445,8 +445,8 @@ class OptimizerV2(trackable.Trackable):
  Args:
  grads_and_vars: List of (gradient, variable) pairs.
  - name: Optional name for the returned operation. Default to the name
  - passed to the `Optimizer` constructor.
  + name: Optional name for the returned operation. Default to the name passed
  + to the `Optimizer` constructor.
  all_reduce_sum_gradients: Whether to sum gradients from different
  replicas in the presense of `tf.distribute.Strategy`. If False, it's
  user responsibility to aggregate the gradients. Default to True.
  