Issue 7994: Make object.__format__ with a non-empty format string a PendingDecprecationWarning. Still need to remove uses of this from various tests.
diff --git a/Misc/NEWS b/Misc/NEWS
index b91bd74..cd6f4ab 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -12,6 +12,14 @@
Core and Builtins
-----------------
+- Issue #7994: Issue a PendingDeprecationWarning if object.__format__
+ is called with a non-empty format string. This is an effort to
+ future-proof user code. If a derived class does not currently
+ implement __format__ but later adds its own __format__, it would
+ most likely break user code that had supplied a format string. This
+ will be changed to a DeprecationWaring in Python 3.3 and it will be
+ an error in Python 3.4.
+
- Issue #8268: Old-style classes (not just instances) now support weak
references.