{% extends 'admin/object_history.html' %}{% comment %}
This file is selected by default to display polymorphic mptt object history.
When using reversion or reversion-compare, this template could be replaced
with the proper {% extends "reversion/object_history.html" %} template.
Hence, the breadcrumb code is in a separate include file.
{% endcomment %}
{% block breadcrumbs %}{% include "admin/polymorphic_tree/object_history_breadcrumbs.html" %}{% endblock %}