message: Fix doMock example
diff: @@ -138,9 +138,13 @@ Returns the `jest` object for chaining.
  ### `jest.doMock(moduleName, factory, options)`
  When using `babel-jest`, calls to `mock` will automatically be hoisted to the top of the code block. Use this method if you want to explicitly avoid this behavior.
  -This is useful when you want to mock a module differently within a same file:
  +One example when this is useful is when you want to mock a module differently within the same file:
  ```js
  +beforeEach(() => {
  + jest.resetModules();
  +});
  +
  test('moduleName 1', () => {
  jest.doMock('../moduleName', () => {
  return jest.fn(() => 1);
  