Issue #17047: remove doubled words added in 3.3
as reported by Serhiy Storchaka and Matthew Barnett.
diff --git a/Lib/email/policy.py b/Lib/email/policy.py
index a17f598..38e88af 100644
--- a/Lib/email/policy.py
+++ b/Lib/email/policy.py
@@ -23,7 +23,7 @@
     """+
     PROVISIONAL
 
-    The API extensions enabled by this this policy are currently provisional.
+    The API extensions enabled by this policy are currently provisional.
     Refer to the documentation for details.
 
     This policy adds new header parsing and folding algorithms.  Instead of