Controlgroup: Update toolbar demo to warn about "this is just a demo"

Author: jzaefferer

demos/controlgroup/toolbar.html

@@ -160,7 +160,7 @@
 	Argument
 
 	How a Ship having passed the Line was driven by storms to the cold Country towards the South Pole;
-	and how from thence she made her course to the tropical Latitude of the Great Pacific Ocean; and 
+	and how from thence she made her course to the tropical Latitude of the Great Pacific Ocean; and
 	of the strange things that befell; and in what manner the Ancyent Marinere came back to his own
 	Country.
 
@@ -270,7 +270,8 @@
 </div>
 <div class="demo-description">
 	<p>A sample editor toolbar</p>
-	<p>Highlight text and edit it using the buttons and dropdowns in the toolbar</p>
+	<p>Highlight text and edit it using the buttons and dropdowns in the toolbar.</p>
+	<p class="warning">Remember: This is only a demo and shouldn't be used for anything in production. Use a proper editor like <a href="http://prosemirror.net/">ProseMirror</a> instead.
 </div>
 </body>
 </html>