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/encodings/cp856.py b/Lib/encodings/cp856.py
index a0aa4c1..f384acb 100644
--- a/Lib/encodings/cp856.py
+++ b/Lib/encodings/cp856.py
@@ -120,10 +120,10 @@
 	0x00d0: None,	# UNDEFINED
 	0x00d1: None,	# UNDEFINED
 	0x00d2: None,	# UNDEFINED
-	0x00d3: None,	# UNDEFINEDS
+	0x00d3: None,	# UNDEFINED
 	0x00d4: None,	# UNDEFINED
 	0x00d5: None,	# UNDEFINED
-	0x00d6: None,	# UNDEFINEDE
+	0x00d6: None,	# UNDEFINED
 	0x00d7: None,	# UNDEFINED
 	0x00d8: None,	# UNDEFINED
 	0x00d9: 0x2518,	# BOX DRAWINGS LIGHT UP AND LEFT