Fix source_span tests.

R=rnystrom@google.com

Review URL: https://codereview.chromium.org//712473002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart/pkg/source_span@41614 260f80e4-7a28-3924-810f-c04153c831b5
1 file changed
tree: 538292eeffc7ec2962569b81219449e89a46986d
  1. pkgs/