merge queue: checking master (afff551) and #507 together

[mergify]

🎉 This pull request has been checked successfully and will be merged soon. 🎉

Branch master (afff551) and #507 are queued together for merge.

This pull request has been created by Mergify to check the mergeability of #507.
You don't need to do anything. Mergify will close this pull request automatically when it is complete.

Required conditions of queue rule default for merge:

No extra conditions.

Required conditions to stay in the queue: None

---
checking_base_sha: afff55162046ffd017be4111b3a2bdb836271097
previous_check_retries: []
previous_failed_batches: []
pull_requests:
  - number: 507
    scopes: []
scopes: []
...