Add new lines above use strict and keep directives at the top

src/core/ReactComponentEnvironment.js

@@ -15,6 +15,7 @@
  *
  * @providesModule ReactComponentEnvironment
  */
+
 "use strict";
 
 var ReactComponentBrowserEnvironment =

src/core/ReactMultiChildUpdateTypes.js

@@ -15,6 +15,7 @@
  *
  * @providesModule ReactMultiChildUpdateTypes
  */
+
 "use strict";
 
 var keyMirror = require('keyMirror');

src/core/__tests__/ReactMultiChild-test.js

@@ -16,6 +16,7 @@
  * @jsx React.DOM
  * @emails react-core
  */
+
 "use strict";
 
 var mocks = require('mocks');

src/dom/__tests__/Danger-test.js

@@ -16,10 +16,10 @@
  * @jsx React.DOM
  * @emails react-core
  */
-"use strict";
-
 /*jslint evil: true */
 
+"use strict";
+
 var React = require('React');
 
 describe('Danger', function() {