From ff64a24c67fcd20bef9305db306b5026990d412b Mon Sep 17 00:00:00 2001
From: Mariatta <Mariatta@users.noreply.github.com>
Date: Fri, 18 Aug 2017 06:21:33 -0700
Subject: Fix broken `Show Source` links on documentation pages (GH-3113)
 (GH-3125)

The `Show Source` was broken because of a change made in sphinx 1.5.1
In Sphinx 1.4.9, the sourcename was "index.txt".
In Sphinx 1.5.1+, it is now "index.rst.txt".
(cherry picked from commit b9ff498793611d1c6a9b99df464812931a1e2d69)
---
 Doc/tools/templates/customsourcelink.html | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Doc/tools/templates/customsourcelink.html b/Doc/tools/templates/customsourcelink.html
index 71d0bba..21af621 100644
--- a/Doc/tools/templates/customsourcelink.html
+++ b/Doc/tools/templates/customsourcelink.html
@@ -4,7 +4,7 @@
     <ul class="this-page-menu">
       <li><a href="{{ pathto('bugs') }}">{% trans %}Report a Bug{% endtrans %}</a></li>
       <li>
-        <a href="https://github.com/python/cpython/blob/{{ version }}/Doc/{{ sourcename|replace('txt', 'rst') }}"
+        <a href="https://github.com/python/cpython/blob/{{ version }}/Doc/{{ sourcename|replace('.rst.txt', '.rst') }}"
             rel="nofollow">{{ _('Show Source') }}
         </a>
       </li>
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