Doc: replace PEP xxx by :pep:`xxx` to create a link on the PEP
diff --git a/Doc/library/wsgiref.rst b/Doc/library/wsgiref.rst
index a97eaec..517fc38 100644
--- a/Doc/library/wsgiref.rst
+++ b/Doc/library/wsgiref.rst
@@ -712,7 +712,7 @@
# use a function (note that you're not limited to a function, you can
# use a class for example). The first argument passed to the function
# is a dictionary containing CGI-style envrironment variables and the
- # second variable is the callable object (see PEP333)
+ # second variable is the callable object (see :pep:`333`)
def hello_world_app(environ, start_response):
status = '200 OK' # HTTP Status
headers = [('Content-type', 'text/plain')] # HTTP Headers