You have to indent anyway. Then "endblock" becomes redundant. Also, you can't have a blank "{% elif %}" - it needs to be followed by a condition. I think a more

You have to indent anyway. Then "endblock" becomes redundant. Also, you can't have a blank "{% elif %}" - it needs to be followed by a condition. I think a more natural and English-like syntax beats having to memorize deviations.