Issue #13505: Make pickling of bytes object compatible with Python 2.

Initial patch by sbt.
diff --git a/Misc/NEWS b/Misc/NEWS
index 6d18ddf..f654d8d 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -10,6 +10,9 @@
 Core and Builtins
 -----------------
 
+- Issue #13505: Pickle bytes objects in a way that is compatible with
+  Python 2 when using protocols <= 2.
+
 - Issue #11147: Fix an unused argument in _Py_ANNOTATE_MEMORY_ORDER.  (Fix
   given by Campbell Barton).