hunk.code_window: export default async function () {
     // Enable Differential loading to run both size checks
     await replaceInFile(
       '.browserslistrc',
       'not IE 9-11',
       'IE 9-11',
     );
     await writeMultipleFiles({
  
hunk.labels: keep keep keep keep replace replace keep keep keep
hunk.after_edit:     'not IE 11',
       'IE 11',
  
hunk.file_path: tests/legacy-cli/e2e/tests/build/differential-loading.ts
hunk.type: replace
file: import {ng} from '../../utils/process';
  import * as fs from '../../utils/fs';
  
  
  const options = {
    encoding: 'utf8'
  };
  
  
  export default function() {
    return Promise.resolve()
      .then(() => fs.prependToFile('./tsconfig.app.json', '\ufeff', options))
      .then(() => fs.prependToFile('angular.json', '\ufeff', options))
      .then(() => ng('build', '--environment=dev'));
  }
  