diff -ur pyserial-2.7.orig/documentation/conf.py pyserial-2.7/documentation/conf.py
--- a/documentation/conf.py     2013-10-18 00:29:53.000000000 +0800
+++ b/documentation/conf.py  2014-03-28 12:41:08.848807687 +0800
@@ -192,9 +192,3 @@
 
 # If false, no module index is generated.
 #latex_use_modindex = True
-
-# for external links to standard library
-intersphinx_mapping = {
-        #~ 'python': ('http://docs.python.org', None),
-        'py': ('http://docs.python.org', None),
-        }