Warning in Python 3.13: unclosed database in <sqlite3.Connection object>

[hyanwong]

This is now popping up on tests under 3.13.

python3.13/encodings/cp437.py:14: ResourceWarning: unclosed database in <sqlite3.Connection object at 0x121164d60>

See https://alexwlchan.net/til/2025/python3-13-sqlite-warnings/