twbs--bootstrap/_includes/header.html

<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<meta name="description" content="{{ page.description | default: site.description | smartify }}">
<meta name="author" content="{{ site.authors }}">
<meta name="generator" content="Jekyll v{{ jekyll.version }}">

<title>
  {%- if page.title -%}
    {{ page.title | smartify }} · {{ site.title | smartify }}
  {%- else -%}
    {{ site.title | smartify }} · {{ site.description | smartify }}
  {%- endif -%}
</title>

<!-- Bootstrap core CSS -->
{% if site.github %}
<link href="{{ site.baseurl }}/dist/css/bootstrap.min.css" rel="stylesheet" integrity="{{ site.cdn.css_hash }}" crossorigin="anonymous">
{% else %}
<link href="{{ site.baseurl }}/dist/css/bootstrap.css" rel="stylesheet">
{% endif %}

<!-- Documentation extras -->
{% if page.layout == "docs" %}
<link href="https://cdn.jsdelivr.net/npm/docsearch.js@2/dist/cdn/docsearch.min.css" rel="stylesheet">
{% endif %}
<link href="{{ site.baseurl }}/assets/css/docs.min.css" rel="stylesheet">

{% include favicons.html %}

{% include social.html %}

<script>
  (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
  (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
  m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
  })(window,document,'script','https://www.google-analytics.com/analytics.js','ga');
  ga('create', 'UA-146052-10', 'getbootstrap.com');
  ga('send', 'pageview');
</script>