fix(@angular-devkit/build-angular): use stripIndent

Author: hrocha16

packages/angular_devkit/build_angular/src/angular-cli-files/models/webpack-configs/common.ts

@@ -5,6 +5,7 @@
  * Use of this source code is governed by an MIT-style license that can be
  * found in the LICENSE file at https://angular.io/license
  */
+import { tags } from '@angular-devkit/core';
 import * as CopyWebpackPlugin from 'copy-webpack-plugin';
 import * as path from 'path';
 import { HashedModuleIdsPlugin, debug } from 'webpack';
@@ -273,7 +274,7 @@ export function getCommonConfig(wco: WebpackConfigOptions) {
   }
 
   if (wco.tsConfig.options.target === 4) {
-    wco.logger.warn(`\nWARNING: Zone.js does not support native async/await
+    wco.logger.warn(tags.stripIndent`WARNING: Zone.js does not support native async/await
       (https://github.com/angular/zone.js/pull/1140) in ES2017. Code inside async/await blocks
        is invisible to zone.js thus not triggering change detection.`);
   }