Remove whitespace generation (#5833)

* 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

packages/babel-plugin-transform-async-generator-functions/test/fixtures/async-generators/class-method/expected.js

@@ -9,4 +9,5 @@ class C {
       return 3;
     })();
   }
-}
+
+}

packages/babel-plugin-transform-async-generator-functions/test/fixtures/async-generators/object-method/expected.js

@@ -9,4 +9,5 @@
       return 3;
     })();
   }
-});
+
+});

packages/babel-plugin-transform-async-generator-functions/test/fixtures/async-generators/static-method/expected.js

@@ -9,4 +9,5 @@ class C {
       return 3;
     })();
   }
-}
+
+}

packages/babel-plugin-transform-async-generator-functions/test/fixtures/for-await/async-arrow/expected.js

@@ -6,7 +6,6 @@ babelHelpers.asyncToGenerator(function* () {
   try {
     for (var _iterator = babelHelpers.asyncIterator(y), _step, _value; _step = yield _iterator.next(), _iteratorNormalCompletion = _step.done, _value = yield _step.value, !_iteratorNormalCompletion; _iteratorNormalCompletion = true) {
       let x = _value;
-
       f(x);
     }
   } catch (err) {
@@ -23,4 +22,4 @@ babelHelpers.asyncToGenerator(function* () {
       }
     }
   }
-});
+});

packages/babel-plugin-transform-async-generator-functions/test/fixtures/for-await/async-function/expected.js

@@ -7,7 +7,6 @@ let f = (() => {
     try {
       for (var _iterator = babelHelpers.asyncIterator(y), _step, _value; _step = yield _iterator.next(), _iteratorNormalCompletion = _step.done, _value = yield _step.value, !_iteratorNormalCompletion; _iteratorNormalCompletion = true) {
         let x = _value;
-
         g(x);
       }
     } catch (err) {
@@ -29,4 +28,4 @@ let f = (() => {
   return function f() {
     return _ref.apply(this, arguments);
   };
-})();
+})();

packages/babel-plugin-transform-async-generator-functions/test/fixtures/for-await/async-generator/expected.js

@@ -7,7 +7,6 @@ let g = (() => {
     try {
       for (var _iterator = babelHelpers.asyncIterator(y), _step, _value; _step = yield babelHelpers.asyncGenerator.await(_iterator.next()), _iteratorNormalCompletion = _step.done, _value = yield babelHelpers.asyncGenerator.await(_step.value), !_iteratorNormalCompletion; _iteratorNormalCompletion = true) {
         let x = _value;
-
         f(x);
       }
     } catch (err) {
@@ -29,4 +28,4 @@ let g = (() => {
   return function g() {
     return _ref.apply(this, arguments);
   };
-})();
+})();

packages/babel-plugin-transform-async-generator-functions/test/fixtures/for-await/destructuring/expected.js

@@ -6,8 +6,10 @@ let f = (() => {
 
     try {
       for (var _iterator = babelHelpers.asyncIterator(a), _step, _value; _step = yield _iterator.next(), _iteratorNormalCompletion = _step.done, _value = yield _step.value, !_iteratorNormalCompletion; _iteratorNormalCompletion = true) {
-        let { x, y: [z] } = _value;
-
+        let {
+          x,
+          y: [z]
+        } = _value;
         g(x, z);
       }
     } catch (err) {
@@ -29,4 +31,4 @@ let f = (() => {
   return function f() {
     return _ref.apply(this, arguments);
   };
-})();
+})();

packages/babel-plugin-transform-async-generator-functions/test/fixtures/nested/arrows-in-declaration/expected.js

@@ -3,9 +3,11 @@ let g = (() => {
     var _this = this;
 
     () => this;
+
     function f() {
       () => this;
     }
+
     babelHelpers.asyncToGenerator(function* () {
       _this;
       yield 1;
@@ -16,4 +18,4 @@ let g = (() => {
   return function g() {
     return _ref.apply(this, arguments);
   };
-})();
+})();