[whitespace,view/graph][xs]: fix up whitespace in view.graph.js.

src/view.graph.js

@@ -118,6 +118,7 @@ my.Graph = Backbone.View.extend({
       return getFormattedX(x);
     };
     
+    // infoboxes on mouse hover on points/bars etc
     var trackFormatter = function (obj) {
       var x = obj.x;
       var y = obj.y;