Use `String::with_capacity` in `format!`#39356

Merged

bors merged 4 commits intorust-lang:masterfrom

krdln:format-with-capacity

Feb 3, 2017

Commits on Jan 28, 2017

use `String::with_capacity` in `format!`
krdln
committed

Commits on Feb 1, 2017

Adjust heuristics to better handle "{}..." format strings.
krdln
committed

Commits on Feb 2, 2017

remove the wrapping arithmetics
krdln
committed

Commits on Feb 3, 2017

Merge remote-tracking branch 'upstream/master' into format-with-capacity
krdln
committed