Comment wrong in adversarial_crypto model
Comment wrong in adversarial_crypto model

According to the code below:
```python
if key is not None:
      combined_message = tf.concat(axis=1, values=[message, key])
else:
      combined_message = message
```python
If the key=None, combined_message is just message, not the key.
sshleifer/object_detection_kitti,jch1/models,jch1/models,tombstone/models,cshallue/models,jazcollins/models,xcyan/models,jch1/models,sshleifer/object_detection_kitti,derekjchow/models,jazcollins/models,jch1/models,xcyan/models,xcyan/models,alexgorban/models,jiaphuan/models,xcyan/models,xcyan/models,tombstone/models,jazcollins/models,jazcollins/models,tombstone/models,jiaphuan/models,xcyan/models,cshallue/models,cshallue/models,derekjchow/models,cshallue/models,jiaphuan/models,derekjchow/models,alexgorban/models,sshleifer/object_detection_kitti,alexgorban/models,sshleifer/object_detection_kitti,tombstone/models,derekjchow/models,alexgorban/models,alexgorban/models,zbigniewwojna/text-rcnn,sshleifer/object_detection_kitti,tombstone/models,cshallue/models,jazcollins/models,jiaphuan/models,tombstone/models,sshleifer/object_detection_kitti,jiaphuan/models,derekjchow/models,jazcollins/models,jiaphuan/models,jch1/models,jch1/models