Add html meta tags

Author: StanFromIreland

Doc/tools/templates/download.html

@@ -12,6 +12,19 @@
   {% set dl_version = release %}
 {% endif %}
 
+{%- block extrahead -%}
+<meta property="og:title" content="Download — Python {{ version }} documentation" />
+<meta property="og:type" content="website" />
+<meta property="og:url" content="https://docs.python.org/{{ version }}/download.html" />
+<meta property="og:site_name" content="Python documentation" />
+<meta property="og:description" content="Download the Python Documentation." />
+<meta property="og:image" content="https://docs.python.org/3/_static/og-image.png" />
+<meta property="og:image:alt" content="Python documentation" />
+<meta name="description" content="Download the Python Documentation." />
+<meta property="og:image:width" content="200" />
+<meta property="og:image:height" content="200" />
+{%- endblock -%}
+
 {% block body %}
 <h1>{% trans %}Download Python {{ dl_version }} Documentation{% endtrans %}</h1>
 

Doc/tools/templates/indexcontent.html

@@ -2,6 +2,18 @@
 {%- block htmltitle -%}
 <title>{{ shorttitle }}</title>
 {%- endblock -%}
+{%- block extrahead -%}
+<meta property="og:title" content="{{ version }} documentation" />
+<meta property="og:type" content="website" />
+<meta property="og:url" content="https://docs.python.org/{{ version }}/index.html" />
+<meta property="og:site_name" content="Python documentation" />
+<meta property="og:description" content="The official Python Documentation." />
+<meta property="og:image" content="https://docs.python.org/3/_static/og-image.png" />
+<meta property="og:image:alt" content="Python documentation" />
+<meta name="description" content="The official Python Documentation." />
+<meta property="og:image:width" content="200" />
+<meta property="og:image:height" content="200" />
+{%- endblock -%}
 {% block body %}
   <h1>{{ docstitle|e }}</h1>
   <p>

Doc/tools/templates/search.html

@@ -3,6 +3,16 @@
     {{ super() }}
     <meta name="robots" content="noindex">
     <script type="text/javascript" src="{{ pathto('_static/glossary_search.js', resource=True) }}"></script>
+    <meta property="og:title" content="Search — Python {{ version }} documentation" />
+    <meta property="og:type" content="website" />
+    <meta property="og:url" content="https://docs.python.org/{{ version }}/search.html" />
+    <meta property="og:site_name" content="Python documentation" />
+    <meta property="og:description" content="Search the Python Documentation." />
+    <meta property="og:image" content="https://docs.python.org/3/_static/og-image.png" />
+    <meta property="og:image:alt" content="Python documentation" />
+    <meta name="description" content="Search the Python Documentation." />
+    <meta property="og:image:width" content="200" />
+    <meta property="og:image:height" content="200" />
 {% endblock %}
 {% block searchresults %}
 <div id="search-results">