> If we leave it as it is, it would be good to add comment in the source code explaining this decision.
I think that __all__ should be left as-is for the time being. Adding
some comments around that decision makes sense to me to avoid any future
confusion around that.

> Also the test case could still be useful to catch future bugs.
Agreed. I've added a couple minor comments to the review.

Thanks for the work on this!