--- a/libervia/backend/plugins/plugin_xep_0272.py	Tue Jun 18 12:06:45 2024 +0200
+++ b/libervia/backend/plugins/plugin_xep_0272.py	Wed Jun 19 18:44:57 2024 +0200
@@ -191,9 +191,9 @@
             # We ask frontend to initiate the session, so we know supported codecs.
             self.host.bridge.call_group_setup(
                 room.roomJID.full(),
-                data_format.serialise({
-                    "to_call": [entity.full() for entity in muji_data["to_call"]]
-                }),
+                data_format.serialise(
+                    {"to_call": [entity.full() for entity in muji_data["to_call"]]}
+                ),
                 client.profile,
             )
 
@@ -215,9 +215,7 @@
         try:
             room = self._muc.get_room(client, room_jid)
         except exceptions.NotFound:
-            log.warning(
-                f"Ignoring MUJI element from an unknown room: {room_jid}"
-            )
+            log.warning(f"Ignoring MUJI element from an unknown room: {room_jid}")
             return
         sdp_data = mapping.parse_sdp(call_data["sdp"], self._j.ROLE_INITIATOR)
         presence_elt, muji_elt = self.generate_presence_and_muji(client, room)
@@ -253,10 +251,7 @@
         try:
             return room._xep_0272_data
         except AttributeError:
-            data = room._xep_0272_data = {
-                "preparing_jids": set(),
-                "to_call": set()
-            }
+            data = room._xep_0272_data = {"preparing_jids": set(), "to_call": set()}
             return data
 
     def generate_presence_and_muji(