Embed a Github gist.
The arguments are:
url: the url to the gist (mandatory)file: by default, the shortcode will pull every file from the URL unless a specific filename is requestedclass: a class to add the div surrounding the iframe
Usage example:
{{ gist(url="https://gist.github.com/shalzz/281559a80af7adb5ab71320f5a802f94") }}
{{ gist(url="https://gist.github.com/shalzz/281559a80af7adb5ab71320f5a802f94", class="gist") }}