Fix checkstyle issue

src/main/java/be/cylab/java/wowa/training/Example.java

@@ -76,7 +76,8 @@ public final class Example {
                 + (end_time - start_time) / 1000 + " seconds");
 
         Utils.computeRocPoints(solution, data, expected, true);
-        System.out.println("AUC value : " + Utils.computeAUC(solution, data, expected));
+        System.out.println("AUC value : "
+                + Utils.computeAUC(solution, data, expected));
     }
 
 }