lint fixes

Author: photonstorm

src/gameobjects/group/Group.js

@@ -564,7 +564,7 @@ var Group = new Class({
                 child.update(time, delta);
             }
         });
-   },
+    },
 
     /**
      * Adds a Game Object to this group.

src/loader/LoaderPlugin.js

@@ -1147,7 +1147,7 @@ var LoaderPlugin = new Class({
         this.systems.events.off(SceneEvents.UPDATE, this.update, this);
 
         //  Call 'destroy' on each file ready for deletion
-        this._deleteQueue.forEach(function(file)
+        this._deleteQueue.forEach(function (file)
         {
             file.destroy();
         });

src/loader/filetypes/FontFile.js

@@ -110,7 +110,7 @@ var FontFile = new Class({
         font.load().then(function ()
         {
             document.fonts.add(font);
-            document.body.classList.add("fonts-loaded");
+            document.body.classList.add('fonts-loaded');
 
             _this.onProcessComplete();