Rollup of 7 pull requests#57755

Merged

bors merged 20 commits intorust-lang:masterfrom

Jan 19, 2019

Commits on Jan 10, 2019

introduce `trait_def_id` method

nikomatsakis
and
alexreg
committed
integrate trait aliases into def-paths / metadata

nikomatsakis
and
alexreg
committed
new trait alias tests

nikomatsakis
and
alexreg
committed

Commits on Jan 13, 2019

Commits on Jan 14, 2019

Make `TokenStream` use `Option`.
nnethercote
committed

Commits on Jan 15, 2019

Add missing unpretty option help message
h-michael
committed

Commits on Jan 16, 2019

Fix release manifest generation
Jethro Beekman
committed

Commits on Jan 17, 2019

Commits on Jan 18, 2019

Commits on Jan 19, 2019