Doc: replace PEP xxx by :pep:`xxx` to create a link on the PEP
diff --git a/Doc/library/threading.rst b/Doc/library/threading.rst
index 4627ca6..a0a1fdd 100644
--- a/Doc/library/threading.rst
+++ b/Doc/library/threading.rst
@@ -14,7 +14,7 @@
 
 .. note::
 
-   Starting with Python 2.6, this module provides PEP 8 compliant aliases and
+   Starting with Python 2.6, this module provides :pep:`8` compliant aliases and
    properties to replace the ``camelCase`` names that were inspired by Java's
    threading API. This updated API is compatible with that of the
    :mod:`multiprocessing` module. However, no schedule has been set for the