Add spaces

demos/hello-aframe/index.html

@@ -79,7 +79,7 @@
             <!-- A 3D camera adapted for AR -->
             <ar-camera></ar-camera>
 
-            <!-- The mage-->
+            <!-- The mage -->
             <ar-root reference-image="mage">
 
                 <!-- Switch from top view to front view -->

demos/hello-aframe/video.html

@@ -79,7 +79,7 @@
             <!-- A 3D camera adapted for AR -->
             <ar-camera></ar-camera>
 
-            <!-- The mage-->
+            <!-- The mage -->
             <ar-root reference-image="mage">
 
                 <!-- Switch from top view to front view -->