Meta: replace tabs in source to fix failing lint (#154)

Author: foolip

fullscreen.bs

@@ -516,16 +516,16 @@ return the result of running <a>exit fullscreen</a> on the <a>context object</a>
 
 <table>
  <thead>
-	<tr>
-	 <th><a lt="event handlers">event handler</a>
-	 <th><a>event handler event type</a>
+  <tr>
+   <th><a lt="event handlers">event handler</a>
+   <th><a>event handler event type</a>
  <tbody>
-	<tr>
-	 <td><dfn attribute for=Document id=handler-document-onfullscreenchange><code>onfullscreenchange</code></dfn>
-	 <td><code>fullscreenchange</code>
-	<tr>
-	 <td><dfn attribute for=Document id=handler-document-onfullscreenerror><code>onfullscreenerror</code></dfn>
-	 <td><code>fullscreenerror</code>
+  <tr>
+   <td><dfn attribute for=Document id=handler-document-onfullscreenchange><code>onfullscreenchange</code></dfn>
+   <td><code>fullscreenchange</code>
+  <tr>
+   <td><dfn attribute for=Document id=handler-document-onfullscreenerror><code>onfullscreenerror</code></dfn>
+   <td><code>fullscreenerror</code>
 </table>
 
 <p class=note>These are not supported by {{ShadowRoot}} or {{Window}} objects, and there are no