* @param path the root path of the diff.
* @param diff the JSOP diff.
* @return the JSOP diff based on an empty root path.
*/
private String normalizeDiff(String path, String diff) throws Exception {
NormalizingJsopHandler handler = new NormalizingJsopHandler();
new JsopParser(path, diff, handler).parse();
return handler.getDiff();
}