Rollup of 4 pull requests#60054

Merged

bors merged 8 commits intorust-lang:masterfrom

Centril:rollup-o40xxaa

Apr 18, 2019

Commits on Apr 12, 2019

Re-export core::str::{EscapeDebug, EscapeDefault, EscapeUnicode} in std
tesuji
committed

Commits on Apr 15, 2019

Remove collection-specific `with_capacity` doc from `std::collections`
gluyas
committed