The one-line fix 3.5.1 describes. It was staged, then unstaged by a `git stash`
of the same path while I read a peer's test, so 314979d landed the changelog,
the version bump and the tests without the change they cover, and its own suite
fails. This completes it: 128 tests green.

Claude-Session: https://claude.ai/code/session_018L1VYzH7LX6Tq2HB5wKCov