Regression test for #489.
Regression test for #489.

I'm not sure which change fixed it, or if it was just a reporter error
(maybe the code in question hadn't been run through dartfmt). Either
way, I can't repro it now.

Fix #489.

R=nweiz@google.com

Review URL: https://codereview.chromium.org//2187373002 .

dart-lang/dart_style