When you have an HTML field, someone can frappe.render_template to render a custom html file. The thing is that frappe uses a not so “trendy” render engine with some crazy {% %} Jinja hacking. I need to disable it.
In the past and in other projects like Django i use something like {% verbatim %} or in the Flask (Jinja) world {% autoescape false %}.
It where something equal in frappe render template engine ? and if not where is the file that initialize the engine options.