* lisp/progmodes/ps-mode.el: Use lexical-binding

And prefer #' to quote function names.

lisp/progmodes/ps-mode.el

-;;; ps-mode.el --- PostScript mode for GNU Emacs
+;;; ps-mode.el --- PostScript mode for GNU Emacs  -*- lexical-binding: t; -*-
 
 ;; Copyright (C) 1999, 2001-2021 Free Software Foundation, Inc.
 
@@ -281,20 +281,20 @@ If nil, use `temporary-file-directory'."
 
 (defvar ps-mode-map
   (let ((map (make-sparse-keymap)))
-    (define-key map "\C-c\C-v" 'ps-run-boundingbox)
-    (define-key map "\C-c\C-u" 'ps-mode-uncomment-region)
-    (define-key map "\C-c\C-t" 'ps-mode-epsf-rich)
-    (define-key map "\C-c\C-s" 'ps-run-start)
-    (define-key map "\C-c\C-r" 'ps-run-region)
-    (define-key map "\C-c\C-q" 'ps-run-quit)
-    (define-key map "\C-c\C-p" 'ps-mode-print-buffer)
-    (define-key map "\C-c\C-o" 'ps-mode-comment-out-region)
-    (define-key map "\C-c\C-k" 'ps-run-kill)
-    (define-key map "\C-c\C-j" 'ps-mode-other-newline)
-    (define-key map "\C-c\C-l" 'ps-run-clear)
-    (define-key map "\C-c\C-b" 'ps-run-buffer)
+    (define-key map "\C-c\C-v" #'ps-run-boundingbox)
+    (define-key map "\C-c\C-u" #'ps-mode-uncomment-region)
+    (define-key map "\C-c\C-t" #'ps-mode-epsf-rich)
+    (define-key map "\C-c\C-s" #'ps-run-start)
+    (define-key map "\C-c\C-r" #'ps-run-region)
+    (define-key map "\C-c\C-q" #'ps-run-quit)
+    (define-key map "\C-c\C-p" #'ps-mode-print-buffer)
+    (define-key map "\C-c\C-o" #'ps-mode-comment-out-region)
+    (define-key map "\C-c\C-k" #'ps-run-kill)
+    (define-key map "\C-c\C-j" #'ps-mode-other-newline)
+    (define-key map "\C-c\C-l" #'ps-run-clear)
+    (define-key map "\C-c\C-b" #'ps-run-buffer)
     ;; FIXME: Add `indent' to backward-delete-char-untabify-method instead?
-    (define-key map "\177" 'ps-mode-backward-delete-char)
+    (define-key map "\177" #'ps-mode-backward-delete-char)
     map)
   "Local keymap to use in PostScript mode.")
 
@@ -336,10 +336,10 @@ If nil, use `temporary-file-directory'."
 (defvar ps-run-mode-map
   (let ((map (make-sparse-keymap)))
     (set-keymap-parent map comint-mode-map)
-    (define-key map "\C-c\C-q" 'ps-run-quit)
-    (define-key map "\C-c\C-k" 'ps-run-kill)
-    (define-key map "\C-c\C-e" 'ps-run-goto-error)
-    (define-key map [mouse-2] 'ps-run-mouse-goto-error)
+    (define-key map "\C-c\C-q" #'ps-run-quit)
+    (define-key map "\C-c\C-k" #'ps-run-kill)
+    (define-key map "\C-c\C-e" #'ps-run-goto-error)
+    (define-key map [mouse-2] #'ps-run-mouse-goto-error)
     map)
   "Local keymap to use in PostScript run mode.")
 
@@ -1092,7 +1092,7 @@ Use line numbers if `ps-run-error-line-numbers' is not nil."
 
 
 ;;
-(add-hook 'kill-emacs-hook 'ps-run-cleanup)
+(add-hook 'kill-emacs-hook #'ps-run-cleanup)
 
 (provide 'ps-mode)