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/binhex.py b/Lib/binhex.py
index 0a28859..275701d 100644
--- a/Lib/binhex.py
+++ b/Lib/binhex.py
@@ -75,7 +75,7 @@
 
 else:
     #
-    # Glue code for non-macintosh useage
+    # Glue code for non-macintosh usage
     #
     
     class FInfo: