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/Python/thread_lwp.h b/Python/thread_lwp.h
index fcfabf5..5d73242 100644
--- a/Python/thread_lwp.h
+++ b/Python/thread_lwp.h
@@ -13,7 +13,7 @@
 #include <lwp/stackdep.h>
 
 #define STACKSIZE	1000	/* stacksize for a thread */
-#define NSTACKS		2	/* # stacks to be put in cache initialy */
+#define NSTACKS		2	/* # stacks to be put in cache initially */
 
 struct lock {
 	int lock_locked;