Possible mistake in (clumsy) heuristics for email-list detection

[Cheaterman]

Hi buddiez, I hope you're all doing goodie ^__^

I've seen the heuristics for email list detection, and to be honest I'm a bit surprised: from what I can see, the only thing it does is checking weither the iterable is of length 2, if it's a tuple, and if both email and name are string types (or name is falsey - typically empty string or None I suppose).

However, the second check seems to have a typo in the sense that it re-checks the email against string types: https://github.com/lavr/python-emails/blob/master/emails/utils.py#L133

Other than that typo, I feel like this logic is either a bit fragile or not sufficiently documented: if name-email pairs should be tuples, the documentation should likely mention it explicitly (I do realize all examples using name-email pairs are using tuples, but AFAICS it is not explicitly said to be preferred over lists).

Thanks for reading, and thanks in advance for clarifying this issue ^__^