Merge pull request #657 from John-Appleseed/patch-1

add reference to the AddTodo solution

docs/Troubleshooting.md

@@ -159,7 +159,7 @@ handleClick() {
 If you’re somewhere deep in the component hierarchy, it is cumbersome to pass the store down manually. This is why [react-redux](https://github.com/gaearon/react-redux) lets you use a `connect` [higher-order component](https://medium.com/@dan_abramov/mixins-are-dead-long-live-higher-order-components-94a0d2f9e750) that will, apart from subscribing you to a Redux store, inject `dispatch` into your component’s props.
 
 The fixed code looks like this:
-
+#### `AddTodo.js`
 ```js
 import { Component } from 'react';
 import { connect } from 'react-redux';