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/wave.py b/Lib/wave.py
index 8bb9ff7..60c0b98 100644
--- a/Lib/wave.py
+++ b/Lib/wave.py
@@ -30,7 +30,7 @@
       tell()          -- return the current position
       close()         -- close the instance (make it unusable)
 The position returned by tell() and the position given to setpos()
-are compatible and have nothing to do with the actual postion in the
+are compatible and have nothing to do with the actual position in the
 file.
 The close() method is called automatically when the class instance
 is destroyed.