Any downside to enabling this by default for users? makes life much easier.
enable jinja2 loopcontrols extension
Great suggestion, but we should avoid modifying Flask core to add the extension. Instead, we should enable the extension on app creation (in src/application/init.py), similar to the approach discussed at http://flask.pocoo.org/mailinglist/archive/2011/6/7/how-to-include-custom-jinja-extensions/#df27559dedb5b6771423dd4c4355b652
Much better! Change works on my machine, I'll make a new pull request soon.