code: function renderHtml(fragment, opts) {
      var html = (!fragment || !u.trim(fragment._txt)) ?
        '&nbsp;' : // show space for empty/missing to allow selection/editing
        renderMarkdown(fragment._txt, opts);
      // use opts.noWrap to avoid breaking CSS nested selectors like li > ul in menus
      if (opts && opts.noWrap) return html;
      var href = (fragment && esc(fragment._href)) || '';
      return '<div data-render-html="' + href + '">' + html + '</div>';
    }
docs: render html from markdown in fragment._txt rewrite local links using page names and https where necessary NOTE: opts are also passed through to marked() - opts.fqLinks will qualify urls.