message: Update nn_impl.py
diff: @@ -458,7 +458,7 @@ def scale_regularization_loss(regularization_loss):
  global_batch_size=GLOBAL_BATCH_SIZE)
  # Add scaled regularization losses.
  - loss += tf.scale_regularization_loss(tf.nn.l2_loss(weights))
  + loss += tf.nn.scale_regularization_loss(tf.nn.l2_loss(weights))
  return loss
  ```
  