I didn't want to rip this logic out wholesale. There is a possibility
the character lexing can be reborn/revisited later, and
disabling it in the parser was easy.
Swift SVN r18102
There's a lot more work to do here, but start to categorize tests
along the lines of what a specification might look like, with
directories (chapters) for basic concepts, declarations, expressions,
statements, etc.
Swift SVN r9958
