SF patch #1031667:  Fold tuples of constants into a single constant

Example:
>>> import dis
>>> dis.dis(compile('1,2,3', '', 'eval'))
  0           0 LOAD_CONST               3 ((1, 2, 3))
              3 RETURN_VALUE
diff --git a/Misc/NEWS b/Misc/NEWS
index b87f128..3c2734b 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -12,6 +12,9 @@
 Core and builtins
 -----------------
 
+- The bytecode optimizer now folds tuples of constants into a single
+  constant.
+
 - PyLong_AsUnsignedLong[Mask] now support int objects as well.
 
 Extension modules