doc improvement

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@17060 71c3de6d-444a-0410-be80-ed276b4c234a

core/src/main/java/hudson/FilePath.java

@@ -899,7 +899,7 @@ public final class FilePath implements Serializable {
      * List up files in this directory that matches the given Ant-style filter.
      *
      * @param includes
-     *      See {@link FileSet} for the syntax. String like "foo/*.zip".
+     *      See {@link FileSet} for the syntax. String like "foo/*.zip" or "foo/**/*.xml"
      * @return
      *      can be empty but always non-null.
      */