Rollup of 7 pull requests#72262

Merged

bors merged 19 commits intorust-lang:masterfrom

Dylan-DPC-zz:rollup-x56q1jj

May 16, 2020

Commits on May 13, 2020

Use simpler impls for some `Iterator` methods for slices.
nnethercote
committed
Change `Iterator::nth` to use `self.next()` in a `while` loop.
nnethercote
committed

Commits on May 16, 2020