refactor: Make acting_user a mandatory kwarg for do_set_realm_message_editing.

zerver/lib/actions.py

@@ -859,7 +859,8 @@ def do_set_realm_message_editing(
     allow_message_editing: bool,
     message_content_edit_limit_seconds: int,
     allow_community_topic_editing: bool,
-    acting_user: Optional[UserProfile] = None,
+    *,
+    acting_user: Optional[UserProfile],
 ) -> None:
     old_values = dict(
         allow_message_editing=realm.allow_message_editing,

zerver/tests/test_events.py

@@ -1140,6 +1140,7 @@ class NormalActionsTest(BaseAction):
                     allow_message_editing,
                     message_content_edit_limit_seconds,
                     False,
+                    acting_user=None,
                 )
             )
             check_realm_update_dict("events[0]", events[0])