Expose the 'master' instance mentioned in the docs.

rhettinger · rhettinger · commit cc39a13d6d66 · 2003-07-11T22:36:52.000Z
diff --git a/Lib/doctest.py b/Lib/doctest.py
@@ -281,6 +281,7 @@ def _test():
     'DocTestSuite',
     'testsource',
     'debug',
+    'master',
 ]
 
 import __future__
