message: test(compiler): fix unwanted `!` operators
  The `I18nComponent` was using `!` for some of its properties
  because it had not initialized them. This is now resolved by explictly
  marking them as optional.
  PR Close
diff: @@ -19,12 +19,9 @@ import {expect} from '@angular/platform-browser/testing/src/matchers';
  template: '',
  })
  export class I18nComponent {
  - // TODO(issue/24571): remove '!'.
  - count!: number;
  - // TODO(issue/24571): remove '!'.
  - sex!: string;
  - // TODO(issue/24571): remove '!'.
  - sexB!: string;
  + count?: number;
  + sex?: string;
  + sexB?: string;
  response: any = {getItemsList: (): any[] => []};
  }
  