bpo-41328: Replace mention of Hudson CI with Travis CI and AppVeyor (GH-21653)

Dmytro Litvinov · web-flow · commit 5e3826785dcc · 2020-07-28T07:48:32.000-07:00
diff --git a/Doc/library/unittest.rst b/Doc/library/unittest.rst
@@ -73,7 +73,7 @@ test runner
    for those new to unit testing.  For production environments it is
    recommended that tests be driven by a continuous integration system such as
    `Buildbot <https://buildbot.net/>`_, `Jenkins <https://jenkins.io/>`_
-   or  `Hudson <http://hudson-ci.org/>`_.
+   or `Travis-CI <https://travis-ci.com>`_, or `AppVeyor <https://www.appveyor.com/>`_.
 
 
 .. _unittest-minimal-example:
