Rollup of 10 pull requests#69212

Closed

JohnTitor wants to merge 24 commits intorust-lang:masterfrom

JohnTitor:rollup-zcbtv4c

Commits on Jan 23, 2020

Updating str.chars docs to mention crates.io.
sdegutis
authored

Commits on Feb 15, 2020

Commits on Feb 16, 2020