[issue18652] Add itertools.first_true (return first true item in iterable)

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

> David said, "now I have a place in the non-test email code where using this
> would lead to easier-to-read code".   IMO, this is telling.  The bar is
> higher than "I would have used this one time".  That doesn't make it worth
> having to learn and remember.

I will explain my last comment. Four months ago this place was rewritten, so 
now there is no place for this function.

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<http://bugs.python.org/issue18652>
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