Rollup of 23 pull requests#58189

Merged

bors merged 53 commits intorust-lang:masterfrom

Feb 5, 2019

Commits on Jan 30, 2019

proc_macro: make `TokenStream::from_streams` pre-allocate its vector.
pnkfelix
committed

Commits on Feb 3, 2019

Commits on Feb 5, 2019