update the tutorial to use str.format
diff --git a/Doc/tutorial/introduction.rst b/Doc/tutorial/introduction.rst
index 5e027a0..c138ce6 100644
--- a/Doc/tutorial/introduction.rst
+++ b/Doc/tutorial/introduction.rst
@@ -372,9 +372,13 @@
Both strings and Unicode strings support a large number of methods for
basic transformations and searching.
+ :ref:`new-string-formatting`
+ Information about string formatting with :meth:`str.format` is described
+ here.
+
:ref:`string-formatting`
- The formatting operations invoked when strings and Unicode strings are the
- left operand of the ``%`` operator are described in more detail here.
+ The old formatting operations invoked when strings and Unicode strings are
+ the left operand of the ``%`` operator are described in more detail here.
.. _tut-unicodestrings: