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-function-bind/test/fixtures/function-bind/bind/expected.js

@@ -1,5 +1,7 @@
 var _context;
 
 var f = (_context = ctx, ns.obj.func).bind(_context);
+
 var g = (_context = ns.obj).func.bind(_context);
-var h = (_context = new X(), y).bind(_context);
+
+var h = (_context = new X(), y).bind(_context);

packages/babel-plugin-transform-function-bind/test/fixtures/function-bind/call/expected.js

@@ -1,6 +1,7 @@
 var _context;
 
 (_context = ctx, ns.obj.func).call(_context);
+
 (_context = ns.obj).func.call(_context);
 
-(_context = ns.obj2, ns.obj1.func).call(_context);
+(_context = ns.obj2, ns.obj1.func).call(_context);

packages/babel-plugin-transform-function-bind/test/fixtures/function-bind/complex-call/expected.js

@@ -1,11 +1,10 @@
 var _context;
 
 import { map, takeWhile, forEach } from "iterlib";
-
 (_context = (_context = (_context = getPlayers(), map).call(_context, function (x) {
   return x.character();
 }), takeWhile).call(_context, function (x) {
   return x.strength > 100;
 }), forEach).call(_context, function (x) {
   return console.log(x);
-});
+});

packages/babel-plugin-transform-function-bind/test/fixtures/function-bind/static-contexts/expected.js

@@ -1,5 +1,5 @@
 var bar = function () {};
-bar.bind(foo);
 
+bar.bind(foo);
 var foo = {};
-foo.bar.bind(foo);
+foo.bar.bind(foo);