message: Update Troubleshooting.md
  Clarified file path usage for unmock
diff: @@ -128,7 +128,7 @@ In Jest 0.9.0, a new API `jest.unmock` was introduced. Together with a plugin
  for babel, this will now work properly when using `babel-jest`:
  ```js
  -jest.unmock('foo'); // Use unmock!
  +jest.unmock('./foo'); // Use unmock!
  import foo from './foo';
  