1 files changed, 8 insertions, 12 deletions

diff --git a/lisp/vc/diff.el b/lisp/vc/diff.el
index dd4b4757e88..2eefdee1836 100644
--- a/lisp/vc/diff.el
+++ b/lisp/vc/diff.el
@@ -1,4 +1,4 @@
-;;; diff.el --- run `diff'
+;;; diff.el --- run `diff'  -*- lexical-binding: t -*-
 
 ;; Copyright (C) 1992, 1994, 1996, 2001-2012 Free Software Foundation, Inc.
 
@@ -147,11 +147,8 @@ specified in `diff-switches' are passed to the diff command."
       (buffer-enable-undo (current-buffer))
       (diff-mode)
       (set (make-local-variable 'revert-buffer-function)
-           (lexical-let ((old old) (new new)
-                         (switches switches)
-                         (no-async no-async))
-             (lambda (ignore-auto noconfirm)
-               (diff-no-select old new switches no-async (current-buffer)))))
+           (lambda (_ignore-auto _noconfirm)
+             (diff-no-select old new switches no-async (current-buffer))))
       (setq default-directory thisdir)
       (let ((inhibit-read-only t))
         (insert command "\n"))
@@ -159,12 +156,11 @@ specified in `diff-switches' are passed to the diff command."
           (let ((proc (start-process "Diff" buf shell-file-name
                                      shell-command-switch command)))
             (set-process-filter proc 'diff-process-filter)
-            (lexical-let ((old-alt old-alt) (new-alt new-alt))
-              (set-process-sentinel
-               proc (lambda (proc msg)
-                      (with-current-buffer (process-buffer proc)
-                        (diff-sentinel (process-exit-status proc)
-                                       old-alt new-alt))))))
+            (set-process-sentinel
+             proc (lambda (proc _msg)
+                    (with-current-buffer (process-buffer proc)
+                      (diff-sentinel (process-exit-status proc)
+                                     old-alt new-alt)))))
         ;; Async processes aren't available.
         (let ((inhibit-read-only t))
           (diff-sentinel