message: fix json content
diff: @@ -35,9 +35,11 @@ test('adds 1 + 2 to equal 3', () => {
  Add the following section to your `package.json`:
  ```json
  +{
  "scripts": {
  "test": "jest"
  }
  +}
  ```
  Finally, run `npm test` and Jest will print this message:
  