Add approximate suggestions for rustfix#47540

Merged

bors merged 3 commits intorust-lang:masterfrom

Manishearth:suggestion

Feb 1, 2018

Commits on Jan 29, 2018

Add approximate suggestions for rustfix
Manishearth
committed
Add -Zapproximate-suggestions
Manishearth
committed
Add internal-only rustc_serialize_exclude_null attribute for making the field only exist in the json if the flag is passed
Manishearth
committed