Hi all, PR to apply black <https://github.com/psf/black> to Airflow's entire codebase has been merged - https://github.com/apache/airflow/pull/9550 and PR to run PyUpgrade <https://github.com/asottile/pyupgrade> has been merged too - https://github.com/apache/airflow/pull/11447, so please rebase your PRs on latest Master.
Regards, Kaxil
