Rollup of 9 pull requests#60859

Closed

Centril wants to merge 27 commits intorust-lang:masterfrom

Centril:rollup-x7rcz9c

Commits on Apr 9, 2019

string: implement From<&String> for String
jsgf
committed

Commits on Apr 12, 2019

Fix convert module's documentation links
czipperz
committed

Commits on Apr 14, 2019

Fix stray ` in previous change
czipperz
committed

Commits on May 10, 2019

Commits on May 12, 2019

Update rustc book CLI docs.
ehuss
committed

Commits on May 13, 2019

Commits on May 14, 2019

Commits on May 15, 2019