Remove empty line
Merge branch 'master' of https://github.com/dart-lang/dart-sublime-bundle
If linter is active, check active file 'on_activated'

Before this fix, the active file had 0 edits and
therefore its check was aborted because the linter
(correctly) thought it hadn't been edited by the user.
Merge pull request #184 from my-personal-forks/master

Always check newly activated file for syntax errors