diff -r be4180f3c236 -r 32903b99c2ef src/Tools/Graphview/model.scala
--- a/src/Tools/Graphview/model.scala	Sat Jan 03 20:22:27 2015 +0100
+++ b/src/Tools/Graphview/model.scala	Sat Jan 03 20:28:53 2015 +0100
@@ -40,7 +40,7 @@
       List(
         Mutator.Node_Expression(".*", false, false, false),
         Mutator.Node_List(Nil, false, false, false),
-        Mutator.Edge_Endpoints(Graph_Display.Node.dummy, Graph_Display.Node.dummy),
+        Mutator.Edge_Endpoints((Graph_Display.Node.dummy, Graph_Display.Node.dummy)),
         Mutator.Add_Node_Expression(""),
         Mutator.Add_Transitive_Closure(true, true)))