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Kevin 9e94e24afd Fix AST for conditional expressions
Previously all conditional expressions were left associative which
produced an AST that was nothing like the one in Jinja and one which
did not respect order of operations within conditions. The conditional
expression part of the grammar has been rewritten to be more explicit
about what can and cannot match which appears to have fixed those
issues with the AST.
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Jinja
=====

Jinja is a fast, expressive, extensible templating engine. Special
placeholders in the template allow writing code similar to Python
syntax. Then the template is passed data to render the final document.

It includes:

-   Template inheritance and inclusion.
-   Define and import macros within templates.
-   HTML templates can use autoescaping to prevent XSS from untrusted
    user input.
-   A sandboxed environment can safely render untrusted templates.
-   AsyncIO support for generating templates and calling async
    functions.
-   I18N support with Babel.
-   Templates are compiled to optimized Python code just-in-time and
    cached, or can be compiled ahead-of-time.
-   Exceptions point to the correct line in templates to make debugging
    easier.
-   Extensible filters, tests, functions, and even syntax.

Jinja's philosophy is that while application logic belongs in Python if
possible, it shouldn't make the template designer's job difficult by
restricting functionality too much.


Installing
----------

Install and update using `pip`_:

.. code-block:: text

    $ pip install -U Jinja2

.. _pip: https://pip.pypa.io/en/stable/quickstart/


In A Nutshell
-------------

.. code-block:: jinja

    {% extends "base.html" %}
    {% block title %}Members{% endblock %}
    {% block content %}
      <ul>
      {% for user in users %}
        <li><a href="{{ user.url }}">{{ user.username }}</a></li>
      {% endfor %}
      </ul>
    {% endblock %}


Links
-----

-   Website: https://palletsprojects.com/p/jinja/
-   Documentation: https://jinja.palletsprojects.com/
-   Releases: https://pypi.org/project/Jinja2/
-   Code: https://github.com/pallets/jinja
-   Issue tracker: https://github.com/pallets/jinja/issues
-   Test status: https://dev.azure.com/pallets/jinja/_build
-   Official chat: https://discord.gg/t6rrQZH