Rollup of 8 pull requests#62253

Merged

bors merged 20 commits intorust-lang:masterfrom

Centril:rollup-115uuuq

Jul 1, 2019

Commits on Jun 27, 2019

Commits on Jun 29, 2019

Fix a typo
lcolaholicl
committed
fix the same typo in doctest
lcolaholicl
committed
Always parse 'async unsafe fn' + properly ban in 2015.
Centril
committed

Commits on Jun 30, 2019