Cruxis/update wiki content

wiki/dev/rnk.md

@@ -4,6 +4,7 @@ The RnK use `ChatMessage` to retrieve the roll, alter it, add the new message an
 > If you have any idea how to modify directly the ChatMessage and update it, let me know.
 
 Usage :
+
 ```js
 new RollnKeepDialog(messageId).render(true);
 ```