QLocale.toString: the format parameter is an int instead of str for floating values

A particular overload should be

def toString(self, f: float, /, format: typing.Literal["e", "E", "f", "F", "g", "G"] = ..., precision: int = ...) -> str: ...

instead of

def toString(self, f: float, /, format: int = ..., precision: int = ...) -> str: ...

That would explicitly read that the format is a single letter, one of “e”, “E”, “f”, “F”, “g”, and “G”.

I haven't tested all the available versions. 6.8 and 6.9 are affected. If I remember right, the issue appears in all the versions.