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-es2015-modules-commonjs/test/fixtures/interop/export-default-11/expected.js

@@ -5,4 +5,5 @@ Object.defineProperty(exports, "__esModule", {
 });
 exports.Cachier = Cachier;
 exports.default = new Cachier();
+
 function Cachier(databaseName) {}

packages/babel-plugin-transform-es2015-modules-commonjs/test/fixtures/interop/export-default-7/expected.js

@@ -4,4 +4,5 @@ Object.defineProperty(exports, "__esModule", {
   value: true
 });
 exports.default = foo;
-function foo() {}
+
+function foo() {}

packages/babel-plugin-transform-es2015-modules-commonjs/test/fixtures/interop/export-default-8/expected.js

@@ -3,5 +3,7 @@
 Object.defineProperty(exports, "__esModule", {
   value: true
 });
+
 class Foo {}
-exports.default = Foo;
+
+exports.default = Foo;

packages/babel-plugin-transform-es2015-modules-commonjs/test/fixtures/interop/export-destructured/expected.js

@@ -10,12 +10,22 @@ let x = exports.x = 0;
 let y = exports.y = 0;
 
 function f1() {
-  ({ x } = { x: 1 });
+  ({
+    x
+  } = {
+    x: 1
+  });
   exports.x = x;
 }
 
 function f2() {
-  ({ x, y } = { x: 2, y: 3 });
+  ({
+    x,
+    y
+  } = {
+    x: 2,
+    y: 3
+  });
   exports.y = y;
   exports.x = x;
 }

packages/babel-plugin-transform-es2015-modules-commonjs/test/fixtures/interop/exports-variable/expected.js

@@ -7,11 +7,16 @@ exports.foo8 = foo8;
 var foo = exports.foo = 1;
 var foo2 = exports.foo2 = 1,
     bar = exports.bar = 2;
+
 var foo3 = exports.foo3 = function () {};
+
 var foo4 = exports.foo4 = undefined;
 let foo5 = exports.foo5 = 2;
 let foo6 = exports.foo6 = undefined;
 const foo7 = exports.foo7 = 3;
+
 function foo8() {}
+
 class foo9 {}
-exports.foo9 = foo9;
+
+exports.foo9 = foo9;

packages/babel-plugin-transform-es2015-modules-commonjs/test/fixtures/interop/module-shadow/expected.js

@@ -3,5 +3,7 @@
 Object.defineProperty(exports, "__esModule", {
   value: true
 });
+
 function _module() {}
+
 exports.module = _module;

packages/babel-plugin-transform-es2015-modules-commonjs/test/fixtures/interop/overview/expected.js

@@ -25,7 +25,6 @@ var _foo5 = require("foo5");
 
 exports.test = test;
 var test2 = exports.test2 = 5;
-
 _foo4.bar;
 _foo5.foo;
-_foo2.default;
+_foo2.default;

packages/babel-plugin-transform-es2015-modules-commonjs/test/fixtures/interop/remap/expected.js

@@ -15,16 +15,11 @@ exports.test = test += 1;
 
 var a = 2;
 exports.a = a;
-
 exports.a = a = 3;
-
 var b = 2;
 exports.c = b;
-
 exports.c = b = 3;
-
 var d = 3;
 exports.e = d;
 exports.f = d;
-
 exports.f = exports.e = d = 4;