Implement PEP 3131. Add isidentifier to str.
diff --git a/Misc/NEWS b/Misc/NEWS
index 342ca2f..0745f8d 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -26,6 +26,8 @@
 Core and Builtins
 -----------------
 
+- PEP 3131: Support non-ASCII identifiers.
+
 - PEP 3120: Change default encoding to UTF-8.
 
 - PEP 3123: Use proper C inheritance for PyObject.