Terry: delete the parent linkage in potDotMethod, sollte alles gut funktionieren

TerryModi/RBTree.java

@@ -279,10 +279,10 @@ class RBTree<T extends Comparable<T>> {
             writer.write("\t\"" + keyString + "\" [fillcolor=" + fillColor + ", fontcolor=" + fontColor + "];\n");
 
             // Print parent link
-            if (node.parent != null) {
+           /*  if (node.parent != null) {
                 String parentKeyString = node.parent.key.toString().replaceAll("[^a-zA-Z0-9]", "_");
                 writer.write("\t\"" + parentKeyString + "\" -> \"" + keyString + "\" [style=dotted];\n");
-            }
+            } */
 
             // Print left child
             if (node.left != null) {