File: //usr/share/php/Symfony/Bundle/TwigBundle/Resources/views/layout.html.twig
<!DOCTYPE html>
<html>
<head>
<meta charset="{{ _charset }}" />
<meta name="robots" content="noindex,nofollow" />
<meta name="viewport" content="width=device-width,initial-scale=1" />
<title>{% block title %}{% endblock %}</title>
<link rel="icon" type="image/png" href="{{ include('@Twig/images/favicon.png.base64') }}">
<style>{{ include('@Twig/exception.css.twig') }}</style>
{% block head %}{% endblock %}
</head>
<body>
<header>
<div class="container">
<h1 class="logo">{{ include('@Twig/images/symfony-logo.svg') }} Symfony Exception</h1>
<div class="help-link">
<a href="https://symfony.com/doc/{{ constant('Symfony\\Component\\HttpKernel\\Kernel::VERSION') }}/index.html">
<span class="icon">{{ include('@Twig/images/icon-book.svg') }}</span>
<span class="hidden-xs-down">Symfony</span> Docs
</a>
</div>
<div class="help-link">
<a href="https://symfony.com/support">
<span class="icon">{{ include('@Twig/images/icon-support.svg') }}</span>
<span class="hidden-xs-down">Symfony</span> Support
</a>
</div>
</div>
</header>
{% block body %}{% endblock %}
{{ include('@Twig/base_js.html.twig') }}
</body>
</html>