http://glfwtfwhlsm2u5pw3b7crist7bt7fwepj2wgv3n3b64unj22v5435tyd.onion/code/qrqma.html
If there were two same-named {% block %} tags in a child template, that template’s parent wouldn’t know which one of the blocks’ content to use.
However, in base templates each {% block %} will get the content of the child template’s content.