* lisp/tooltip.el: Use lexical-binding.

diff --git a/lisp/tooltip.el b/lisp/tooltip.el
index 5f5a4788b2621865b4fb0ae2387d3e9c5dd90bd5..00d21666c23eb59a461533cc7ddf85931816b4ec 100644 (file)
--- a/lisp/tooltip.el
+++ b/lisp/tooltip.el
@@ -1,4 +1,4 @@
-;;; tooltip.el --- show tooltip windows
+;;; tooltip.el --- show tooltip windows  -*- lexical-binding:t -*-
 
 ;; Copyright (C) 1997, 1999-2020 Free Software Foundation, Inc.