When possible without changing semantics, implement Iterator::last in terms of DoubleEndedIterator::next_back for types in liballoc and libcore.#62316

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bors merged 1 commit intorust-lang:masterfrom khuey:efficient_last

Jul 4, 2019

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Commits on Jul 2, 2019

When possible without changing semantics, implement Iterator::last in terms of DoubleEndedIterator::next_back for types in liballoc and libcore.
khuey
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