Fixed typo in RestDoc.js

src/docs/utils/RestDoc.js

@@ -53,7 +53,7 @@ export default class MyComponent extends Component {
         <section>
           <p>Utility functions for performing REST calls. Applications that
             interact with REST APIs should
-            use <a href="https://github.com/whatwg/fetch">fetch</a> and
+            use <a href="https://github.com/whatwg/fetch">fetch</a> and 
             <a href="https://www.promisejs.org">promises</a>. This Rest
             module provides a few helper functions along the way.</p>
         </section>