This PR is stale because it has been open for 30 days with no activity.

Thanks for this — sorry it sat so long.

I've reimplemented the same normalization in #152435, which also fixes the root cause (Open._fixresult() dispatched single-vs-multiple by result type, so an empty () was misread as a multiple selection) and adds tests. You're credited as co-author there, since you fixed the ""-vs-()/b"" inconsistency first.

Closing as superseded by #152435 — thanks again.