Mention warnings about defining None.
diff --git a/Misc/NEWS b/Misc/NEWS
index 2c9d83f..7a26000 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -57,6 +57,9 @@
Core and builtins
+- Use of 'None' as a variable, argument or attribute name now
+ issues a SyntaxWarning. In the future, None may become a keyword.
+
- SET_LINENO is gone. co_lnotab is now consulted to determine when to
call the trace function. C code that accessed f_lineno should call
PyCode_Addr2Line instead (f_lineno is still there, but not kept up