Migrate to Sphinx 1.0 C language constructs.
diff --git a/Doc/tutorial/inputoutput.rst b/Doc/tutorial/inputoutput.rst
index 84e83b5..04665f8 100644
--- a/Doc/tutorial/inputoutput.rst
+++ b/Doc/tutorial/inputoutput.rst
@@ -208,7 +208,7 @@
---------------------
The ``%`` operator can also be used for string formatting. It interprets the
-left argument much like a :cfunc:`sprintf`\ -style format string to be applied
+left argument much like a :c:func:`sprintf`\ -style format string to be applied
to the right argument, and returns the string resulting from this formatting
operation. For example::