Fix some trailing whitespace grunt errors

js/module.js

@@ -156,7 +156,7 @@ var Module = Class.extend({
 	/** nunjucksEnvironment()
 	 * Returns the nunjucks environment for the current module.
 	 * The environment is checked in the _nunjucksEnvironment instance variable.
-	 * 
+
 	 * @returns Nunjucks Environment
 	 */
 	nunjucksEnvironment: function() {