Implement specialized nth_back() for Box and Windows.#59328

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bors merged 2 commits intorust-lang:masterfrom

koalatux:iter-nth-back

Mar 24, 2019

Commits on Feb 16, 2019

implement nth_back for Box
koalatux
committed

Commits on Feb 23, 2019

implement nth_back for Windows
koalatux
committed