In contrast to traditional html comments like this:
<!-- not so secret secrets -->
Django template comments are not rendered in the final html. So you can feel free to stuff implementation details in there like so:
Multi-line:
{% comment %}
The other half of the flexbox is defined
in a different file `sidebar.html`
as <div id="sidebar-main">.
{% endcomment %}
Single line:
{# jquery latest #}
{#
beware, this won't be commented out...
actually renders as regular body text on the page
#}
I find this especially helpful for <a href="{% url 'view_name' %}"
views that have not been created yet.