message: Promise in example
diff: @@ -30,7 +30,9 @@ You can import Vega-Embed from a local copy or (as shown below) [from CDNJS](htt
  <script type="text/javascript">
  var spec = "https://raw.githubusercontent.com/vega/vega/master/docs/examples/bar-chart.vg.json";
  - vega.embed('#vis', spec);
  + vega.embed('#vis', spec).then(function(result) {
  + // access view as result.view
  + }).catch(console.error);
  </script>
  </body>
  </html>
  