Add arbitrary keys to VC

Change-Id: I3a26665a861c428ffb40b2387437dcc4296b461c
diff --git a/dev/js/src/hint/prefix.js b/dev/js/src/hint/prefix.js
index bdc7bdf..dc14d5c 100644
--- a/dev/js/src/hint/prefix.js
+++ b/dev/js/src/hint/prefix.js
@@ -6,7 +6,7 @@
      */
     create : function (params) {
       return Object.create(prefixClass).
-	upgradeTo(this)._init(params);
+	      upgradeTo(this)._init(params);
     },
 
     /**