bors 8b6838b6e1 Auto merge of #75021 - cuviper:array_chunks_mut, r=scottmcm
Add `slice::array_chunks_mut`

This follows `array_chunks` from #74373 with a mutable version, `array_chunks_mut`. The implementation is identical apart from mutability. The new tests are adaptations of the `chunks_exact_mut` tests, plus an inference test like the one for `array_chunks`.

I reused the unstable feature `array_chunks` and tracking issue #74985, but I can separate that if desired.

r? `@withoutboats`
cc `@lcnr`
2020-09-12 03:59:46 +00:00
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