replaced "h.defaulted(x,y)" with "x?:y"

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@16489 71c3de6d-444a-0410-be80-ed276b4c234a

core/src/main/java/hudson/Functions.java

@@ -869,7 +869,7 @@ public class Functions {
     /**
      * If the value exists, return that value. Otherwise return the default value.
      * <p>
-     * This method is useful for supplying a default value to a form field.
+     * Starting 1.294, JEXL supports the elvis operator "x?:y" that supercedes this.
      *
      * @since 1.150
      */