* lisp/progmodes/cpp.el: Use lexical binding.

diff --git a/lisp/progmodes/cpp.el b/lisp/progmodes/cpp.el
index bcbe669c16e95e2fab0f12993cf6c5940a62a9a7..65ef83f769894d2f6b5407280c392ab095c30df0 100644 (file)
--- a/lisp/progmodes/cpp.el
+++ b/lisp/progmodes/cpp.el
@@ -1,4 +1,4 @@
-;;; cpp.el --- highlight or hide text according to cpp conditionals
+;;; cpp.el --- highlight or hide text according to cpp conditionals -*- lexical-binding: t -*-
 
 ;; Copyright (C) 1994-1995, 2001-2020 Free Software Foundation, Inc.