Merge pull request #2412 from zachpanz88/patch-3

Enable line tests

gulpfile.js

@@ -44,7 +44,6 @@ var testFiles = [
 
   // Disable tests which need to be rewritten based on changes introduced by
   // the following changes: https://github.com/chartjs/Chart.js/pull/2346
-  '!./test/controller.line.tests.js',
   '!./test/core.layoutService.tests.js',
   '!./test/defaultConfig.tests.js',
 ];