Remove trailing comma

Author: jawshooah

lib/layout.js

@@ -371,7 +371,7 @@ function positionSelfEdges(g) {
         { x: x + 5 * dx / 6, y: y - dy },
         { x: x +     dx    , y: y },
         { x: x + 5 * dx / 6, y: y + dy },
-        { x: x + 2 * dx / 3, y: y + dy },
+        { x: x + 2 * dx / 3, y: y + dy }
       ];
       node.label.x = node.x;
       node.label.y = node.y;