Function tagAt

static/editor.md/lib/codemirror/addon/fold/xml-fold.js:28–31

(iter, ch)

  }

  function tagAt(iter, ch) {
    var type = iter.cm.getTokenTypeAt(Pos(iter.line, ch));
    return type && /\btag\b/.test(type);
  }

  function nextLine(iter) {
    if (iter.line >= iter.max) return;