Rollup of 6 pull requests#42780

Merged

bors merged 23 commits intorust-lang:masterfrom

frewsxcv:rollup

Jun 21, 2017

Commits on Jun 17, 2017

Convert `Into<Box<[T]>> for Vec<T>` into `From<Vec<T>> for Box<[T]>`
ollie27
committed

Commits on Jun 19, 2017

Commits on Jun 20, 2017