Backport source links from 3.x.
Existing links have been updated to use the new reST role. In some
files, I have also made cosmetic changes to the header.
diff --git a/Doc/library/timeit.rst b/Doc/library/timeit.rst
index 21f9796..7fbe19e 100644
--- a/Doc/library/timeit.rst
+++ b/Doc/library/timeit.rst
@@ -1,4 +1,3 @@
-
:mod:`timeit` --- Measure execution time of small code snippets
===============================================================
@@ -12,6 +11,10 @@
single: Benchmarking
single: Performance
+**Source code:** :source:`Lib/timeit.py`
+
+--------------
+
This module provides a simple way to time small bits of Python code. It has both
command line as well as callable interfaces. It avoids a number of common traps
for measuring execution times. See also Tim Peters' introduction to the