diff -r df33dbbef7bb Doc/library/pickle.rst
--- a/Doc/library/pickle.rst	Sun Oct 11 17:52:09 2015 +0300
+++ b/Doc/library/pickle.rst	Sun Oct 11 17:56:01 2015 +0300
@@ -488,7 +488,7 @@ methods:
 
 .. method:: object.__getnewargs_ex__()
 
-   In protocols 4 and newer, classes that implements the
+   In protocols 2 and newer, classes that implements the
    :meth:`__getnewargs_ex__` method can dictate the values passed to the
    :meth:`__new__` method upon unpickling.  The method must return a pair
    ``(args, kwargs)`` where *args* is a tuple of positional arguments
@@ -500,15 +500,18 @@ methods:
    class requires keyword-only arguments.  Otherwise, it is recommended for
    compatibility to implement :meth:`__getnewargs__`.
 
+   .. versionchanged:: 3.6
+      :meth:`__getnewargs_ex__` is used in protocols 2 and 3.
+
 
 .. method:: object.__getnewargs__()
 
-   This method serve a similar purpose as :meth:`__getnewargs_ex__` but
-   for protocols 2 and newer.  It must return a tuple of arguments ``args``
+   This method serve a similar purpose as :meth:`__getnewargs_ex__`.
+   It must return a tuple of arguments ``args``
    which will be passed to the :meth:`__new__` method upon unpickling.
 
-   In protocols 4 and newer, :meth:`__getnewargs__` will not be called if
-   :meth:`__getnewargs_ex__` is defined.
+   :meth:`__getnewargs__` will not be called if :meth:`__getnewargs_ex__` is
+   defined.
 
 
 .. method:: object.__getstate__()