* Remove whitespace generation and rely on default printing
Changes to printing:
* Add newline after last empty SwitchCase
* Add newlines around block comments if they are non-flow comments or contain newlines
* Fix a few more fixtures
* Desugar class properties to Object.defineProperty per spec
* Define uninitialized static class properties with value=undefined
* Make class-properties increased spec compliance opt-in (spec: true)