--- old/src/share/classes/javax/swing/text/GapContent.java	2014-02-12 23:37:55.000000000 -0800
+++ new/src/share/classes/javax/swing/text/GapContent.java	2014-02-12 23:37:54.000000000 -0800
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1998, 2008, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1998, 2014, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -58,6 +58,7 @@
  *
  * @author  Timothy Prinzing
  */
+@SuppressWarnings("serial") // Superclass is not serializable across versions
 public class GapContent extends GapVector implements AbstractDocument.Content, Serializable {
 
     /**
@@ -577,7 +578,7 @@
         unusedMarks = 0;
     }
 
-
+    @SuppressWarnings("serial") // Superclass is not serializable across versions
     static class MarkVector extends GapVector {
 
         MarkVector() {
@@ -855,6 +856,7 @@
     /**
      * UnoableEdit created for inserts.
      */
+    @SuppressWarnings("serial") // Superclass is a JDK-implementation class
     class InsertUndo extends AbstractUndoableEdit {
         protected InsertUndo(int offset, int length) {
             super();
@@ -905,6 +907,7 @@
     /**
      * UndoableEdit created for removes.
      */
+    @SuppressWarnings("serial") // JDK-implementation class
     class RemoveUndo extends AbstractUndoableEdit {
         protected RemoveUndo(int offset, String string) {
             super();