Prettier Switch-Cases

1) This is not "new syntax"; syntactically the language is exactly the same. It's just reordering of statements for clarity / maintainability.

2) Better languages don't have fall-through in the first place. The whole idea is just utterly weird.

Modern compilers will warn on unannotated case fallthru, so no need for this.

It's just another reason to use -Werror so you cannot miss warnings.