message: docs(docs-infra): use recommended type assertion
  Angular uses tslint:recommended by default. The default for no-angle-bracket-type-assertion is true
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diff: @@ -28,7 +28,7 @@ export class KeyUpComponent_v1 {
  // #docregion key-up-component-1-class
  onKey(event: KeyboardEvent) { // with type info
  - this.values += (<HTMLInputElement>event.target).value + ' | ';
  + this.values += (event.target as HTMLInputElement).value + ' | ';
  }
  // #docregion key-up-component-1-class-no-type
  }
  