Announce the change in the CancelledError inheritance (GH-16730)

pgjones · 1st1 · commit e634da27471a · 2019-10-12T13:46:13.000-04:00
This is a fairly noticeable change that requires adjustments in
existing asyncio code. It should therefore be announced.
diff --git a/Doc/whatsnew/3.8.rst b/Doc/whatsnew/3.8.rst
@@ -1659,6 +1659,10 @@ Changes in the Python API
   environment variable and does not use :envvar:`HOME`, which is not normally
   set for regular user accounts.
 
+* The Exception :class:`asyncio.CancelledError` now inherits from
+  :class:`BaseException` rather than a :class:`Exception`.
+  (Contributed by Yury Selivanov in :issue:`13528`.)
+
 .. _bpo-36085-whatsnew:
 
 * DLL dependencies for extension modules and DLLs loaded with :mod:`ctypes` on
