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/traceback.py b/Lib/traceback.py
index 4675077..d219340 100644
--- a/Lib/traceback.py
+++ b/Lib/traceback.py
@@ -117,7 +117,7 @@
 	have the same meaning as the corresponding arguments to
 	print_exception().  The return value is a list of strings, each
 	ending in a newline and some containing internal newlines.  When 
-	these lines are contatenated and printed, exactly the same text is
+	these lines are concatenated and printed, exactly the same text is
 	printed as does print_exception()."""
 	if tb:
 		list = ['Traceback (most recent call last):\n']