Index: wp-includes/admin-bar.php
===================================================================
--- wp-includes/admin-bar.php	(revision 38337)
+++ wp-includes/admin-bar.php	(working copy)
@@ -196,7 +196,11 @@
 	}
 
 	$avatar = get_avatar( $user_id, 26 );
-	$howdy  = sprintf( __('Howdy, %1$s'), $current_user->display_name );
+	$howdy  = sprintf(
+		/* translators: %s: current user display name */
+		__( 'Howdy, %s' ),
+		$current_user->display_name
+	);
 	$class  = empty( $avatar ) ? '' : 'with-avatar';
 
 	$wp_admin_bar->add_menu( array(
@@ -293,9 +297,17 @@
 	}
 
 	if ( is_network_admin() ) {
-		$blogname = sprintf( __('Network Admin: %s'), esc_html( get_current_site()->site_name ) );
+		$blogname = sprintf(
+			/* translators: %s: site name */
+			__( 'Network Admin: %s' ),
+			esc_html( get_current_site()->site_name )
+		);
 	} elseif ( is_user_admin() ) {
-		$blogname = sprintf( __('User Dashboard: %s'), esc_html( get_current_site()->site_name ) );
+		$blogname = sprintf(
+			/* translators: %s: site name */
+			__( 'User Dashboard: %s' ),
+			esc_html( get_current_site()->site_name )
+		);
 	}
 
 	$title = wp_html_excerpt( $blogname, 40, '…' );