Spelling fixes supplied by Rob W. W. Hooft. All these are fixes in either
comments, docstrings or error messages. I fixed two minor things in
test_winreg.py ("didn't" -> "Didn't" and "Didnt" -> "Didn't").

There is a minor style issue involved: Guido seems to have preferred English
grammar (behaviour, honour) in a couple places. This patch changes that to
American, which is the more prominent style in the source. I prefer English
myself, so if English is preferred, I'd be happy to supply a patch myself ;)
diff --git a/Lib/xml/sax/xmlreader.py b/Lib/xml/sax/xmlreader.py
index 8bc33d8..84a8bbb 100644
--- a/Lib/xml/sax/xmlreader.py
+++ b/Lib/xml/sax/xmlreader.py
@@ -50,7 +50,7 @@
     def setLocale(self, locale):
         """Allow an application to set the locale for errors and warnings. 
    
-        SAX parsers are not required to provide localisation for errors
+        SAX parsers are not required to provide localization for errors
         and warnings; if they cannot support the requested locale,
         however, they must throw a SAX exception. Applications may
         request a locale change in the middle of a parse."""