Krzysztof Alboszta

@mrcmorales check discussions here: https://github.com/symfony/symfony/pull/12894 and here: https://github.com/symfony/AsseticBundle/issues/331 and also explanation here: https://github.com/Spea/SpBowerBundle/issues/119 issue is related to template notation like `{% extend 'layout.html.twig' %}`