Index: src/wp-admin/ms-delete-site.php
===================================================================
--- src/wp-admin/ms-delete-site.php	(revision 45154)
+++ src/wp-admin/ms-delete-site.php	(working copy)
@@ -78,7 +78,8 @@
 	$content = str_replace( '###URL_DELETE###', $url_delete, $content );
 	$content = str_replace( '###SITE_NAME###', get_network()->site_name, $content );
 
-	wp_mail( get_option( 'admin_email' ), '[ ' . wp_specialchars_decode( get_option( 'blogname' ) ) . ' ] ' . __( 'Delete My Site' ), $content );
+	/* translators: %s: site name */
+	wp_mail( get_option( 'admin_email' ), sprintf( __( '[%s] Delete My Site' ), wp_specialchars_decode( get_option( 'blogname' ) ) ), $content );
 
 	if ( $switched_locale ) {
 		restore_previous_locale();