Issue #1066: implement PEP 3109, 2/3 of PEP 3134.
diff --git a/Lib/doctest.py b/Lib/doctest.py
index 2374d44..395f8b6 100644
--- a/Lib/doctest.py
+++ b/Lib/doctest.py
@@ -1608,7 +1608,7 @@
          '42\n'
 
          >>> exc_info = failure.exc_info
-         >>> raise exc_info[0], exc_info[1], exc_info[2]
+         >>> raise exc_info[1] # Already has the traceback
          Traceback (most recent call last):
          ...
          KeyError
@@ -2146,7 +2146,7 @@
              '42\n'
 
              >>> exc_info = failure.exc_info
-             >>> raise exc_info[0], exc_info[1], exc_info[2]
+             >>> raise exc_info[1] # Already has the traceback
              Traceback (most recent call last):
              ...
              KeyError