Inspired by SF patch #860326, make the exception formatting by
traceback.py be closer to the built-in formatting.
A few unittests had to be fixed, too.
diff --git a/Lib/test/test_doctest.py b/Lib/test/test_doctest.py
index 12d75dd..1390e15 100644
--- a/Lib/test/test_doctest.py
+++ b/Lib/test/test_doctest.py
@@ -2234,7 +2234,7 @@
>>> doctest.testfile('test_doctest.txt', raise_on_error=True)
... # doctest: +ELLIPSIS
Traceback (most recent call last):
- UnexpectedException: ...
+ doctest.UnexpectedException: ...
>>> doctest.master = None # Reset master.
If the tests contain non-ASCII characters, the tests might fail, since