[Python-checkins] Update references to master to point to main in customsourcelink.html (GH-25993)

[pablogsal]

https://github.com/python/cpython/commit/873275e64aae4caa6ddcea28ca3a026f37659d58
commit: 873275e64aae4caa6ddcea28ca3a026f37659d58
branch: main
author: Pablo Galindo <Pablogsal at gmail.com>
committer: pablogsal <Pablogsal at gmail.com>
date: 2021-05-08T17:13:24+01:00
summary:

Update references to master to point to main in customsourcelink.html (GH-25993)

files:
M Doc/tools/templates/customsourcelink.html

diff --git a/Doc/tools/templates/customsourcelink.html b/Doc/tools/templates/customsourcelink.html
index fca44e9163cac7..eb9db9e341bd75 100644
--- a/Doc/tools/templates/customsourcelink.html
+++ b/Doc/tools/templates/customsourcelink.html
@@ -4,7 +4,7 @@ <h3>{{ _('This Page') }}</h3>
     <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/master/Doc/{{ sourcename|replace('.rst.txt', '.rst') }}"
+        <a href="https://github.com/python/cpython/blob/main/Doc/{{ sourcename|replace('.rst.txt', '.rst') }}"
             rel="nofollow">{{ _('Show Source') }}
         </a>
       </li>