[pyupgrade] synapse/ (#10348)

This PR is tantamount to running 
```
pyupgrade --py36-plus --keep-percent-format `find synapse/ -type f -name "*.py"`
```

Part of #9744

synapse/storage/databases/main/deviceinbox.py

@@ -203,9 +203,7 @@ class DeviceInboxWorkerStore(SQLBaseStore):
             "delete_messages_for_device", delete_messages_for_device_txn
         )
 
-        log_kv(
-            {"message": "deleted {} messages for device".format(count), "count": count}
-        )
+        log_kv({"message": f"deleted {count} messages for device", "count": count})
 
         # Update the cache, ensuring that we only ever increase the value
         last_deleted_stream_id = self._last_device_delete_cache.get(

synapse/storage/databases/main/group_server.py

@@ -27,8 +27,11 @@ from synapse.util import json_encoder
 _DEFAULT_CATEGORY_ID = ""
 _DEFAULT_ROLE_ID = ""
 
+
 # A room in a group.
-_RoomInGroup = TypedDict("_RoomInGroup", {"room_id": str, "is_public": bool})
+class _RoomInGroup(TypedDict):
+    room_id: str
+    is_public: bool
 
 
 class GroupServerWorkerStore(SQLBaseStore):
@@ -92,6 +95,7 @@ class GroupServerWorkerStore(SQLBaseStore):
               "is_public": False                    # Whether this is a public room or not
             }
         """
+
         # TODO: Pagination
 
         def _get_rooms_in_group_txn(txn):

synapse/storage/databases/main/roommember.py

@@ -649,7 +649,7 @@ class RoomMemberWorkerStore(EventsWorkerStore):
             event_to_memberships = await self._get_joined_profiles_from_event_ids(
                 missing_member_event_ids
             )
-            users_in_room.update((row for row in event_to_memberships.values() if row))
+            users_in_room.update(row for row in event_to_memberships.values() if row)
 
         if event is not None and event.type == EventTypes.Member:
             if event.membership == Membership.JOIN: