long(string, base) now takes time linear in len(string) when base is a
power of 2. Enabled the tail end of test_long() in pickletester.py
because it no longer takes forever when run from test_pickle.py.
diff --git a/Misc/NEWS b/Misc/NEWS
index 5d3f57c..e9f105b 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -12,6 +12,9 @@
Core and builtins
-----------------
+- long(string, base) takes time linear in len(string) when base is a power
+ of 2 now. It used to take time quadratic in len(string).
+
- filter returns now Unicode results for Unicode arguments.
- raw_input can now return Unicode objects.