<iframe></iframe> becomes </iframe>

[nabedge]

template:
<iframe></iframe>

code:

        InputStream in = new FileInputStream(templateFilePath);
        Html html = m2e.loadHtmlTemplate(in);
        log.info(m2e.saveToString(html));

expected behavier: get <iframe></iframe>

actual result: <iframe />

[nabedge]

fixed.