Whitespace normalization.  Ugh, we really need to do this more often.
You might want to review this change as it's my first time.  Be gentle. :-)
diff --git a/Lib/urllib2.py b/Lib/urllib2.py
index 8a1b61b..6bfbc29 100644
--- a/Lib/urllib2.py
+++ b/Lib/urllib2.py
@@ -490,7 +490,7 @@
     def http_response(self, request, response):
         code, msg, hdrs = response.code, response.msg, response.info()
 
-        # According to RFC 2616, "2xx" code indicates that the client's 
+        # According to RFC 2616, "2xx" code indicates that the client's
         # request was successfully received, understood, and accepted.
         if not (200 <= code < 300):
             response = self.parent.error(