* write newlines for fixtures * rerun fixtures
* 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
* feat(transform-object-rest-spread): add polyfill=false option to avoid extends helper * object-rest-spread: add useBuiltIns option * add test for invalid option