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-umd/test/fixtures/umd/export-default-11/expected.js

@@ -18,5 +18,6 @@
   });
   exports.Cachier = Cachier;
   exports.default = new Cachier();
+
   function Cachier(databaseName) {}
-});
+});

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

@@ -17,5 +17,6 @@
     value: true
   });
   exports.default = foo;
+
   function foo() {}
-});
+});

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

@@ -16,6 +16,8 @@
   Object.defineProperty(exports, "__esModule", {
     value: true
   });
+
   class Foo {}
+
   exports.default = Foo;
-});
+});

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

@@ -20,12 +20,17 @@
   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-umd/test/fixtures/umd/hoist-function-exports/expected.js

@@ -18,6 +18,7 @@
   });
   exports.isOdd = undefined;
   exports.nextOdd = nextOdd;
+
   function nextOdd(n) {
     return (0, _evens.isEven)(n) ? n + 1 : n + 2;
   }
@@ -27,4 +28,4 @@
       return !isEven(n);
     };
   }(_evens.isEven);
-});
+});

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

@@ -14,7 +14,5 @@
   "use strict";
 
   var foo = babelHelpers.interopRequireWildcard(_foo);
-
-
   foo;
-});
+});

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

@@ -20,10 +20,7 @@
   var foo2 = babelHelpers.interopRequireWildcard(_foo);
   exports.test = test;
   var test2 = exports.test2 = 5;
-
   exports.default = test;
-
-
   _foo.bar;
   _foo.foo;
-});
+});

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

@@ -28,17 +28,12 @@
 
   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;
-});
+});