Improve error messages for raw strings (#60762)#70522

Merged

bors merged 7 commits intorust-lang:masterfrom

rcoh:60762-raw-string-errors

Apr 1, 2020

Commits on Mar 28, 2020

Move raw string tests into the raw directory
rcoh
committed

Commits on Mar 30, 2020

Clean up redudant conditions and match exprs
rcoh
committed

Commits on Mar 31, 2020

Fix tests to handle debug_assert
rcoh
committed