Index: src/wp-includes/js/customize-preview.js
===================================================================
--- src/wp-includes/js/customize-preview.js	(revision 26169)
+++ src/wp-includes/js/customize-preview.js	(working copy)
@@ -90,10 +90,10 @@
 			preview.send( 'synced' );
 		});
 
-	 	preview.bind( 'active', function() {
-	 		if ( api.settings.nonce )
-	 			preview.send( 'nonce', api.settings.nonce );
-	 	});
+        preview.bind( 'active', function() {
+            if ( api.settings.nonce )
+                preview.send( 'nonce', api.settings.nonce );
+        });
 
 		preview.send( 'ready' );