Merge remote changes, keeping local test assertions without comments

Author: abmercer

python/jupyterlab-chat/jupyterlab_chat/tests/test_ychat.py

@@ -221,7 +221,7 @@ def test_update_message_append_no_duplicate_mentions():
     updated_msg = chat.get_message(msg_id)
     assert updated_msg
     assert updated_msg.mentions == [USER2.username]
-    assert len(updated_msg.mentions) == 1 
+    assert len(updated_msg.mentions) == 1
 
 
 def test_indexes_by_id():