Yuki Okushi f923f73b9a
Rollup merge of #85930 - mominul:array_into_iter, r=m-ou-se
Update standard library for IntoIterator implementation of arrays

This PR partially resolves issue #84513 of updating the standard library part.

I haven't found any remaining doctest examples which are using iterators over e.g. &i32 instead of just i32 in the standard library. Can anyone point me to them if there's remaining any?

Thanks!

r? ```@m-ou-se```
2021-06-06 19:11:19 +09:00
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2021-05-20 19:42:29 -07:00
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