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-amd/test/fixtures/amd/export-default-7/expected.js

@@ -5,5 +5,6 @@ define(["exports"], function (exports) {
     value: true
   });
   exports.default = foo;
+
   function foo() {}
-});
+});

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

@@ -4,6 +4,8 @@ define(["exports"], function (exports) {
   Object.defineProperty(exports, "__esModule", {
     value: true
   });
+
   class Foo {}
+
   exports.default = Foo;
-});
+});

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

@@ -8,12 +8,17 @@ define(["exports"], function (exports) {
   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;
-});
+});

packages/babel-plugin-transform-es2015-modules-amd/test/fixtures/amd/hoist-function-exports/expected.js

@@ -6,6 +6,7 @@ define(["exports", "./evens"], function (exports, _evens) {
   });
   exports.isOdd = undefined;
   exports.nextOdd = nextOdd;
+
   function nextOdd(n) {
     return (0, _evens.isEven)(n) ? n + 1 : n + 2;
   }
@@ -15,4 +16,4 @@ define(["exports", "./evens"], function (exports, _evens) {
       return !isEven(n);
     };
   }(_evens.isEven);
-});
+});

packages/babel-plugin-transform-es2015-modules-amd/test/fixtures/amd/imports-glob/expected.js

@@ -2,7 +2,5 @@ define(["foo"], function (_foo) {
   "use strict";
 
   var foo = babelHelpers.interopRequireWildcard(_foo);
-
-
   foo;
-});
+});

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

@@ -8,12 +8,9 @@ define(["exports", "foo", "foo-bar", "./directory/foo-bar"], function (exports,
   var foo2 = babelHelpers.interopRequireWildcard(_foo);
   exports.test = test;
   var test2 = exports.test2 = 5;
-
   exports.default = test;
-
-
   foo2.default;
   foo2;
   _foo.bar;
   _foo.foo;
-});
+});

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

@@ -16,17 +16,12 @@ define(["exports"], function (exports) {
 
   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;
-});
+});