I have a little problem understanding what an expression like {{ something.render() | safe }} does .
{{ something.render() | safe }}
From what I have seen, without the safe ke
safe
The safe filter explicitly marks a string as "safe", i.e., it should not be automatically-escaped if auto-escaping is enabled.
The documentation on this filter is here.
See the section on manual escaping to see which characters qualify for escaping.