BUG: Jinja2 templating functionality breaks

[Korving-F]

Because the Jinja2 template / Scenario go through multiple steps of pre-processing, some scenarios using standard Jinja2 functionality breaks while it shouldn't.

# Does work: variables and filters
{{ some_variable | to_nice_json }}

# Does not work: statements
{% set my_var= "something" %}

# Untested: comments
{# my super duper comment #}

[Korving-F]

This is caused by the sequential sweep in scenario.py and most likely requires some regex-based string-replacement solution instead.

DACA/daca/scenario.py

Line 200 in ee73a8d

template_string = template_string.replace('"{{','{{').replace('}}"','}}')