cybernet/base.html.twig

## base.html.twig
<!DOCTYPE html>
<html lang="en">
<head>
    <title>{% block title %}TiTLE{% endblock %}</title>
    <meta charset="UTF-8">
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <meta name="author" content="cybernet2u">
    <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1">
    <meta name="description" content="{% block meta_desc %}{{ meta_desc_tag }}{% endblock %}"> {# changed as suggested #}
    <meta name="keywords" content="{% block meta_keys %}{{ meta_keys }}{% endblock %}">
    <meta property="og:type" content= "website" />
    <meta property="og:site_name" content="{{ site_title }}" />
    <meta property="og:url" content="{{ url('show_index') }}"/>
    <meta name="twitter:description" property="og:description" itemprop="description" content="xxx" />
    <meta name='robots' content='index,follow'>
    <meta name='url' content='{{ url('show_index') }}'>
    <meta name='generator' content='{{ project_name }} {{ app_version }}'>
    <link rel="canonical" href="{% block permlink %}{{ app.request.uri }}{% endblock %}" />
    <link rel="dns-prefetch" href="//{{ analyticsd_domain }}">
    <link rel="dns-prefetch" href="//cdnjs.cloudflare.com">

    {% block stylesheets %}

        <!--[if lt IE 9]> <script src="{{ asset('js/modernizr.custom.js') }}"></script> <![endif]-->
    {% endblock %}
</head>
<body class="dark">
{% block body %}{% endblock %}
{% block javascripts %}
    <script src="{{ asset('js/jquery.js') }}"></script>
    <!--[if lt IE 10]> <script src="{{ asset('js/ie8.js') }}"></script> <![endif]-->
    <script src="{{ asset('js/plugins.js') }}"></script>
    <script src="{{ asset('js/init.min.js') }}"></script>
{% endblock %}
{% include 'inc/_tracking.html.twig' %}
</body>
</html>

## index.html.twig
{# Super trimmed #}
{% extends 'base.html.twig'  %}
{% block body %}
{# even some more divs #}
            </div>
        </div>
        <!-- /RIGHTPART -->
    </div>
</div>
<!-- / WRAPPER ALL -->
{% endblock %}
	<!DOCTYPE html>
	<html lang="en">
	<head>
	<title>{% block title %}TiTLE{% endblock %}</title>
	<meta charset="UTF-8">
	<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
	<meta name="author" content="cybernet2u">
	<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1">
	<meta name="description" content="{% block meta_desc %}{{ meta_desc_tag }}{% endblock %}"> {# changed as suggested #}
	<meta name="keywords" content="{% block meta_keys %}{{ meta_keys }}{% endblock %}">
	<meta property="og:type" content= "website" />
	<meta property="og:site_name" content="{{ site_title }}" />
	<meta property="og:url" content="{{ url('show_index') }}"/>
	<meta name="twitter:description" property="og:description" itemprop="description" content="xxx" />
	<meta name='robots' content='index,follow'>
	<meta name='url' content='{{ url('show_index') }}'>
	<meta name='generator' content='{{ project_name }} {{ app_version }}'>
	<link rel="canonical" href="{% block permlink %}{{ app.request.uri }}{% endblock %}" />
	<link rel="dns-prefetch" href="//{{ analyticsd_domain }}">
	<link rel="dns-prefetch" href="//cdnjs.cloudflare.com">

	{% block stylesheets %}

	<!--[if lt IE 9]> <script src="{{ asset('js/modernizr.custom.js') }}"></script> <![endif]-->
	{% endblock %}
	</head>
	<body class="dark">
	{% block body %}{% endblock %}
	{% block javascripts %}
	<script src="{{ asset('js/jquery.js') }}"></script>
	<!--[if lt IE 10]> <script src="{{ asset('js/ie8.js') }}"></script> <![endif]-->
	<script src="{{ asset('js/plugins.js') }}"></script>
	<script src="{{ asset('js/init.min.js') }}"></script>
	{% endblock %}
	{% include 'inc/_tracking.html.twig' %}
	</body>
	</html>
	{# Super trimmed #}
	{% extends 'base.html.twig' %}
	{% block body %}
	{# even some more divs #}
	</div>
	</div>
	<!-- /RIGHTPART -->
	</div>
	</div>
	<!-- / WRAPPER ALL -->
	{% endblock %}