Clarify list/set/dict/tuple comprehensions and enforce via flake8 (#6957)

* commit '509e381af':
  Clarify list/set/dict/tuple comprehensions and enforce via flake8 (#6957)
  changelog
  Increase MAX_EVENTS_BEHIND for replication clients

1 files changed, 1 insertions, 1 deletions

diff --git a/synapse/push/pusherpool.py b/synapse/push/pusherpool.py

index b9dca5bc63..01789a9fb4 100644
--- a/synapse/push/pusherpool.py
+++ b/synapse/push/pusherpool.py
@@ -191,7 +191,7 @@ class PusherPool:
                 min_stream_id - 1, max_stream_id
             )
             # This returns a tuple, user_id is at index 3
-            users_affected = set([r[3] for r in updated_receipts])
+            users_affected = {r[3] for r in updated_receipts}
 
             for u in users_affected:
                 if u in self.pushers: