No translators, you don't need to localize a non-breaking space.

git-svn-id: https://develop.svn.wordpress.org/trunk@18916 602fd350-edb4-49c9-b593-d223f7449a82

wp-includes/admin-bar.php

@@ -111,7 +111,7 @@ function wp_admin_bar_wp_menu( $wp_admin_bar ) {
 	$wp_admin_bar->add_menu( array(
 		'parent' => 'wp-logo',
 		'id'     => 'wp-logo-secondary',
-		'title'  => __( ' ' ),
+		'title'  => ' ',
 		'meta'   => array(
 			'class' => 'secondary',
 		),