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/dos-8x3/sre_comp.py b/Lib/dos-8x3/sre_comp.py
index 590e45f..fa0cf37 100644
--- a/Lib/dos-8x3/sre_comp.py
+++ b/Lib/dos-8x3/sre_comp.py
@@ -20,7 +20,7 @@
     if len(array.array(WORDSIZE, [0]).tostring()) == _sre.getcodesize():
         break
 else:
-    raise RuntimeError, "cannot find a useable array type"
+    raise RuntimeError, "cannot find a usable array type"
 
 def _compile(code, pattern, flags):
     # internal: compile a (sub)pattern