Issue #17047: remove doubled words added in 3.3
as reported by Serhiy Storchaka and Matthew Barnett.
diff --git a/Lib/email/mime/text.py b/Lib/email/mime/text.py
index 80ff950..3b5b09f 100644
--- a/Lib/email/mime/text.py
+++ b/Lib/email/mime/text.py
@@ -26,7 +26,7 @@
         Content-Transfer-Encoding header will also be set.
         """
 
-        # If no _charset was specified, check to see see if there are non-ascii
+        # If no _charset was specified, check to see if there are non-ascii
         # characters present. If not, use 'us-ascii', otherwise use utf-8.
         # XXX: This can be removed once #7304 is fixed.
         if _charset is None: