wpml( txt, inline ) {
    if (!txt) { return ''; }
    inline = (inline && !inline.hash) || false;
    txt = XML(txt.trim());
    txt = inline ? MD(txt).replace(/^\s*<p>|<\/p>\s*$/gi, '') : MD(txt);
    txt = H2W( txt );
    return txt;
  }
Convert inline Markdown to inline WordProcessingML.