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-flow-comments/test/fixtures/flow-comments/arrow-single-optional-param/expected.js

@@ -1 +1,3 @@
-const x = (foo /*:: ?*/) => {};
+const x = (foo
+/*:: ?*/
+) => {};

packages/babel-plugin-transform-flow-comments/test/fixtures/flow-comments/arrow-single-param-type/expected.js

@@ -1 +1,3 @@
-const x = (foo /*: string*/) => {};
+const x = (foo
+/*: string*/
+) => {};

packages/babel-plugin-transform-flow-comments/test/fixtures/flow-comments/class-prop-values-2/expected.js

@@ -1,4 +1,6 @@
 class X {
   /*:: a: number*/
+
   /*:: b: ?string*/
-}
+
+}

packages/babel-plugin-transform-flow-comments/test/fixtures/flow-comments/class-prop-values/expected.js

@@ -1,5 +1,9 @@
 class X {
   foo = 2;
-  bar /*: number*/ = 3;
+  bar
+  /*: number*/
+  = 3;
+
   /*:: baz: ?string*/
-}
+
+}

packages/babel-plugin-transform-flow-comments/test/fixtures/flow-comments/declare-statements/expected.js

@@ -1,16 +1,31 @@
 /*:: declare var foo*/
+
 /*:: declare var foo;*/
+
 /*:: declare function foo(): void*/
+
 /*:: declare function foo(): void;*/
+
 /*:: declare function foo<T>(): void;*/
+
 /*:: declare function foo(x: number, y: string): void;*/
+
 /*:: declare class A {}*/
+
 /*:: declare class A<T> extends B<T> { x: number }*/
+
 /*:: declare class A { static foo(): number, static x : string }*/
+
 /*:: declare class A { static [ indexer: number]: string }*/
+
 /*:: declare class A { static () : number }*/
+
 /*:: declare class A mixins B<T>, C {}*/
+
 /*:: declare type A = string*/
+
 /*:: declare type T<U> = { [k:string]: U }*/
+
 /*:: declare interface I { foo: string }*/
-/*:: declare interface I<T> { foo: T }*/
+
+/*:: declare interface I<T> { foo: T }*/

packages/babel-plugin-transform-flow-comments/test/fixtures/flow-comments/def-site-variance/expected.js

@@ -1,3 +1,9 @@
-class C /*:: <+T, -U>*/ {}
-function f /*:: <+T, -U>*/() {}
-/*:: type T<+T, -U> = {};*/
+class C
+/*:: <+T, -U>*/
+{}
+
+function f
+/*:: <+T, -U>*/
+() {}
+
+/*:: type T<+T, -U> = {};*/

packages/babel-plugin-transform-flow-comments/test/fixtures/flow-comments/default-parameters/expected.js

@@ -1,6 +1,23 @@
-function foo(numVal /*:: ?*/) {}
-function foo(numVal /*:: ?*/ = 2) {}
-function foo(numVal /*: number*/) {}
-function foo(numVal /*:: ?: number*/) {}
-function foo(numVal /*: number*/ = 2) {}
-function foo(numVal /*:: ?: number*/ = 2) {}
+function foo(numVal
+/*:: ?*/
+) {}
+
+function foo(numVal
+/*:: ?*/
+= 2) {}
+
+function foo(numVal
+/*: number*/
+) {}
+
+function foo(numVal
+/*:: ?: number*/
+) {}
+
+function foo(numVal
+/*: number*/
+= 2) {}
+
+function foo(numVal
+/*:: ?: number*/
+= 2) {}

packages/babel-plugin-transform-flow-comments/test/fixtures/flow-comments/export-type-alias/expected.js

@@ -1,4 +1,5 @@
 /*:: export type GraphQLFormattedError = number;*/
+
 /*:: export type GraphQLFormattedError = {
   message: string,
   locations?: Array<{
@@ -6,5 +7,7 @@
     column: number
   }>
 };*/
+
 /*:: export interface foo { p: number }*/
-/*:: export interface foo<T> { p: T }*/
+
+/*:: export interface foo<T> { p: T }*/

packages/babel-plugin-transform-flow-comments/test/fixtures/flow-comments/import-export/expected.js

@@ -1,4 +1,4 @@
 import lib from 'library';
 export { foo } from 'foo';
-/*:: export type { B, C } from './types';*/
 
+/*:: export type { B, C } from './types';*/

packages/babel-plugin-transform-flow-comments/test/fixtures/flow-comments/import-type-alias/expected.js

@@ -1,3 +1,5 @@
 import lib from 'library';
+
 /*:: import type A, { B, C } from './types';*/
-/*:: import typeof D, { E, F } from './types';*/
+
+/*:: import typeof D, { E, F } from './types';*/

packages/babel-plugin-transform-flow-comments/test/fixtures/flow-comments/object-method-type-annotations/expected.js

@@ -1,6 +1,10 @@
 // @flow
 var obj = {
-  method: function (a /*: string*/) /*: number*/ {
+  method: function (a
+  /*: string*/
+  )
+  /*: number*/
+  {
     return 5 + 5;
   }
-};
+};

packages/babel-plugin-transform-flow-comments/test/fixtures/flow-comments/optional-parameters/expected.js

@@ -1 +1,3 @@
-function multiply(num /*:: ?: number*/) {}
+function multiply(num
+/*:: ?: number*/
+) {}

packages/babel-plugin-transform-flow-comments/test/fixtures/flow-comments/optional-type/expected.js

@@ -1,2 +1,7 @@
-function foo(bar /*:: ?*/) {}
-function foo2(bar /*:: ?: string*/) {}
+function foo(bar
+/*:: ?*/
+) {}
+
+function foo2(bar
+/*:: ?: string*/
+) {}

packages/babel-plugin-transform-flow-comments/test/fixtures/flow-comments/transformed-class-method-loose-return-type-annotation/expected.js

@@ -4,7 +4,11 @@
 var C = function () {
   function C() {}
 
-  C.prototype.m = function m(x /*: number*/) /*: string*/ {
+  C.prototype.m = function m(x
+  /*: number*/
+  )
+  /*: string*/
+  {
     return 'a';
   };
 

packages/babel-plugin-transform-flow-comments/test/fixtures/flow-comments/transformed-class-method-return-type-annotation/expected.js

@@ -8,7 +8,11 @@ var C = function () {
 
   babelHelpers.createClass(C, [{
     key: "m",
-    value: function m(x /*: number*/) /*: string*/ {
+    value: function m(x
+    /*: number*/
+    )
+    /*: string*/
+    {
       return 'a';
     }
   }]);

packages/babel-plugin-transform-flow-comments/test/fixtures/flow-comments/type-alias-with-comment/expected.js

@@ -1,6 +1,8 @@
 /*:: type T = /*test*-/ number;*/
+
 /*:: type T2 = /* *-ESCAPED/ *-/ number;*/
+
 /*:: type CustomType = {
 /** This is some documentation. *-/
 name: string;
-};*/
+};*/

packages/babel-plugin-transform-flow-comments/test/fixtures/flow-comments/type-alias/expected.js

@@ -1,13 +1,17 @@
 function a() {}
+
 /*:: type A = number;*/
+
 /*:: type B = {
   name: string;
 };*/
+
 /*:: type union =
  | {type: "A"}
  | {type: "B"}
 ;*/
+
 /*:: type overloads =
   & ((x: string) => number)
   & ((x: number) => string)
-;*/
+;*/

packages/babel-plugin-transform-flow-comments/test/fixtures/flow-comments/type-cast/expected.js

@@ -1,2 +1,8 @@
-var a = (y /*: any*/);
-var a = ((y /*: foo*/) /*: any*/);
+var a = (y
+/*: any*/
+);
+var a = ((y
+/*: foo*/
+)
+/*: any*/
+);

packages/babel-plugin-transform-flow-comments/test/fixtures/flow-comments/type/expected.js

@@ -1 +1,5 @@
-function foo(x /*: number*/) /*: string*/ {}
+function foo(x
+/*: number*/
+)
+/*: string*/
+{}