u06 fix

u06/src/com/mymart/ShoppingCart.java

@@ -44,7 +44,7 @@ public class ShoppingCart {
         for (CartItem item : items) {
             sb.append(item);
         }
-        sb.append("%nSumme:%55.2f%n".formatted(this.getTotalCost()));
+        sb.append(String.format("%nSumme:%55.2f%n", this.getTotalCost()));
         return sb.toString();
     }
 }

u06/src/com/mymart/Test.java

@@ -1,5 +1,8 @@
 package com.mymart;
 
+/**
+ * Test Klasse für ShoppingCart und CartItem
+ */
 public class Test {
 
     public static void main(String[] args) {