As far as I can tell, this method was in 2.0, so rolling the @since 2.1 back to 2.0. Hopefully this explains why JDiff thought it was a removed and added method signature

git-svn-id: https://svn.apache.org/repos/asf/jakarta/commons/proper/lang/trunk@160809 13f79535-47bb-0310-9956-ffa450edef68

src/java/org/apache/commons/lang/builder/ReflectionToStringBuilder.java

@@ -399,7 +399,7 @@ public class ReflectionToStringBuilder extends ToStringBuilder {
      * @return the String result
      * @throws IllegalArgumentException
      *                  if the Object is <code>null</code>
-     * @since 2.1
+     * @since 2.0
      */
     public static String toString(Object object, ToStringStyle style, boolean outputTransients, Class reflectUpToClass) {
         return new ReflectionToStringBuilder(object, style, null, reflectUpToClass, outputTransients).toString();