The key name list defines as following:
If web application developers want to make their own text editor, they don't need these control characters (i.e., they discards them with some code). And I have no idea that these values are useful for web application developers.
So, I'd like to suggest that these keys' char value should be empty string.
Gary will check what the current implementations do here...
(In reply to comment #1)
> Gary will check what the current implementations do here...
At least IE9 generated them.
This bug is conditional on whether we keep char in the depends on bug.
#22071 has been fixed in the latest ED.