Minor formatting fix

Author: jakezatecky

README.md

@@ -44,7 +44,6 @@ Either include one of these files in your stylesheets or utilize a CSS loader:
 import 'react-checkbox-tree/lib/react-checkbox-tree.css';
 ```
 
-
 ### Render Component
 
 A quick usage example is included below. Note that the react-checkbox-tree component is [controlled](https://facebook.github.io/react/docs/forms.html#controlled-components). In other words, as a stateless component, you must update its `checked` and `expanded` properties whenever a change occurs.

src/js/CheckboxTree.js

@@ -121,6 +121,7 @@ class CheckboxTree extends React.Component {
         if (id !== null) {
             newState = { ...newState, id };
         }
+
         model.deserializeLists({
             checked: newProps.checked,
             expanded: newProps.expanded,