Fix remaining warning

Author: alexeyr

spec/dummy/client/app/startup/HelloWorldRehydratable.jsx

@@ -1,6 +1,6 @@
 import PropTypes from 'prop-types';
 import React from 'react';
-import ReactOnRails from 'react-on-rails';
+import ReactOnRails from 'react-on-rails/client';
 import RailsContext from '../components/RailsContext';
 
 class HelloWorldRehydratable extends React.Component {

spec/dummy/client/app/startup/ReduxSharedStoreApp.client.jsx

@@ -1,5 +1,5 @@
-// Top level component for client side.
-// Compare this to the ./ServerApp.jsx file which is used for server side rendering.
+// Top level component for the client side.
+// Compare this to the ./ReduxSharedStoreApp.server.jsx file which is used for server side rendering.
 
 import React from 'react';
 import { Provider } from 'react-redux';

spec/dummy/client/app/startup/ReduxSharedStoreApp.server.jsx

@@ -1,5 +1,5 @@
-// Top level component for serer side.
-// Compare this to the ./ClientReduxSharedStoreApp.jsx file which is used for client side rendering.
+// Top level component for the server side.
+// Compare this to the ./ReduxSharedStoreApp.client.jsx file which is used for client side rendering.
 
 import React from 'react';
 import ReactOnRails from 'react-on-rails';