d one file out of a gist using the `data-file` attribute. The
  `data-file` attribute is optional. -->
  <amp-gist
    data-gistid="a19e811dcd7df10c4da0931641538497"
    data-file="hi.c"
    layout="fixed-height"
    height="197">
  </amp-gist>

</body>
</html>
