Update `black`

    -> Vulnerability found in black version 23.11.0
       Vulnerability ID: 66742
       Affected spec: <24.3.0
       ADVISORY: Affected versions of Black are vulnerable to Regular
       Expression Denial of Service (ReDoS) via the...
       CVE-2024-21503
       For more information, please visit
       https://data.safetycli.com/v/66742/f17

Also re-run `black` to pick up any changes from the new version and
update some unit test that relied on how black formats.