Issue23675 - A tiny clarification in the MRO glossary term.

Doc/glossary.rst

@@ -519,7 +519,8 @@ Glossary
    method resolution order
       Method Resolution Order is the order in which base classes are searched
       for a member during lookup. See `The Python 2.3 Method Resolution Order
-      <https://www.python.org/download/releases/2.3/mro/>`_.
+      <https://www.python.org/download/releases/2.3/mro/>`_ for details of the
+      algorithm used by the Python interpreter since the 2.3 release.
 
    module
       An object that serves as an organizational unit of Python code.  Modules