2020-03-16

Merge #3573

3573: Check all crates of the workspace r=matklad a=matklad

Previously, if the root of the was was a real crate, only this crate
was checked.

Ideally, we might want some kind of config here (which might be just
overriding the whole command), but `--workspace` is def a nicer
default.

r? @kiljacken 

Co-authored-by: Aleksey Kladov <aleksey.kladov@gmail.com>