I agree that a quick glance in the rear view mirror shows that the design isn't awesome. But I just don't see how we can change it at this point. It is what it is.

And it's no surprise that int and float have the same behavior: they share the same code in Python/formatter_unicode.h. Which means that even if we did want to change one but not the other, we'd have to duplicate a lot of code and live with the maintenance hassle forever.