From 4e1e30dae9077aee8ac510981387ccb86b61e6ae Mon Sep 17 00:00:00 2001
From: Nick Coghlan <ncoghlan@gmail.com>
Date: Thu, 9 Feb 2017 17:00:31 +0100
Subject: [PATCH] Issue #26355: Specify canonical URLs in docs pages

Add canonical header link on each page to corresponding major version of the documentation.

Patch by Matthias Bussonnier.
---
 Doc/tools/templates/layout.html | 1 +
 Misc/NEWS                       | 3 +++
 2 files changed, 4 insertions(+)

diff --git a/Doc/tools/templates/layout.html b/Doc/tools/templates/layout.html
index 78b3b27e7c..c48754f0bc 100644
--- a/Doc/tools/templates/layout.html
+++ b/Doc/tools/templates/layout.html
@@ -16,6 +16,7 @@
 {% block relbar2 %} {% if builder != 'qthelp' %} {{ relbar() }} {% endif %} {% endblock %}
 {% block extrahead %}
     <link rel="shortcut icon" type="image/png" href="{{ pathto('_static/py.png', 1) }}" />
+    <link rel="canonical" href="https://docs.python.org/2/{{pagename}}.html" />
     {% if not embedded %}<script type="text/javascript" src="{{ pathto('_static/copybutton.js', 1) }}"></script>{% endif %}
     {% if versionswitcher is defined and not embedded %}<script type="text/javascript" src="{{ pathto('_static/version_switch.js', 1) }}"></script>{% endif %}
 {{ super() }}
diff --git a/Misc/NEWS b/Misc/NEWS
index 69033a3a99..f0ba8c6213 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -85,6 +85,9 @@ C API
 Documentation
 -------------
 
+- Issue #26355: Add canonical header link on each page to corresponding major
+  version of the documentation. Patch by Matthias Bussonnier.
+
 - Issue #12067: Rewrite Comparisons section in the Expressions chapter of the
   language reference. Some of the details of comparing mixed types were
   incorrect or ambiguous. Added default behaviour and consistency suggestions
-- 
2.50.1