Since abc._Abstract was replaces by a new type flags the regression test suite fails. I've added a new function inspect.isabstract(). Is the mmethod fine or should I check if object is a instance of type or subclass of object, too?
diff --git a/Misc/NEWS b/Misc/NEWS
index 208c350..43785cc 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -447,6 +447,8 @@
Library
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+- Add inspect.isabstract(object) to fix bug #2223
+
- Add a __format__ method to Decimal, to support PEP 3101.
- Add a timing parameter when using trace.Trace to print out timestamps.