Issue 2690: Add support for slicing and negative indices to range objects (includes precalculation and storage of the range length).

Refer to the tracker issue for the language moratorium implications of this change
diff --git a/Misc/NEWS b/Misc/NEWS
index 07a62ee..13c29cd 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -10,6 +10,8 @@
 Core and Builtins
 -----------------
 
+- Issue #2690: Range objects support negative indices and slicing
+
 - Issue #9915: Speed up sorting with a key.
 
 - Issue #7475: Added transform() and untransform() methods to both bytes and
@@ -652,7 +654,7 @@
 - Issue #9252: PyImport_Import no longer uses a fromlist hack to return the
   module that was imported, but instead gets the module from sys.modules.
 
-- Issue #9212: The range type_items now provides index() and count() methods, to
+- Issue #9213: The range type_items now provides index() and count() methods, to
   conform to the Sequence ABC.  Patch by Daniel Urban and Daniel Stutzbach.
 
 - Issue #7994: Issue a PendingDeprecationWarning if object.__format__ is called