To add comments or comment out code, wrap the text between {# and #}:
{# this is a comment #}
Unlike HTML comments, such as <!-- comment -->, Scriggo comments, such as {# comment #}, are not visible in the page source in the browser because they are discarded during rendering.
Scriggo comments can also be nested:
{#
{# show the promotion #}
Current promotion: {{ promotion }}
#}