docs(): fix a typo: patform -> platform

Author: felixonmars

modules/angular2/platform/testing/browser.ts

@@ -12,7 +12,7 @@ import {CONST_EXPR} from 'angular2/src/facade/lang';
 export {CACHED_TEMPLATE_PROVIDER} from 'angular2/platform/browser';
 
 /**
- * Default patform providers for testing.
+ * Default platform providers for testing.
  */
 export const TEST_BROWSER_PLATFORM_PROVIDERS: Array<any /*Type | Provider | any[]*/> =
     CONST_EXPR([TEST_BROWSER_STATIC_PLATFORM_PROVIDERS]);

modules/angular2/platform/testing/browser_static.ts

@@ -37,7 +37,7 @@ function initBrowserTests() {
 }
 
 /**
- * Default patform providers for testing without a compiler.
+ * Default platform providers for testing without a compiler.
  */
 export const TEST_BROWSER_STATIC_PLATFORM_PROVIDERS: Array<any /*Type | Provider | any[]*/> =
     CONST_EXPR([

modules/angular2/platform/testing/server.ts

@@ -47,7 +47,7 @@ function initServerTests() {
 }
 
 /**
- * Default patform providers for testing.
+ * Default platform providers for testing.
  */
 export const TEST_SERVER_PLATFORM_PROVIDERS: Array<any /*Type | Provider | any[]*/> = CONST_EXPR([
   PLATFORM_COMMON_PROVIDERS,