Summing3 doesn't work with Travis CI

BruceEckel · BruceEckel · commit 0c6fc300f73c · 2017-05-14T00:01:45.000-06:00
diff --git a/concurrent/Summing3.java b/concurrent/Summing3.java
@@ -2,6 +2,7 @@
 // (c)2017 MindView LLC: see Copyright.txt
 // We make no guarantees that this code is fit for any purpose.
 // Visit http://OnJava8.com for more book information.
+// {ExcludeFromTravisCI}
 import java.util.*;
 
 public class Summing3 {
