Don't clobber match data in 'y-or-n-p'

* lisp/subr.el (y-or-n-p): Avoid clobbering caller's match data.
(Bug#61091)

1 files changed, 8 insertions, 6 deletions

diff --git a/lisp/subr.el b/lisp/subr.el
index 0f754fcd31f..32c997425cf 100644
--- a/lisp/subr.el
+++ b/lisp/subr.el
@@ -3573,12 +3573,14 @@ like) while `y-or-n-p' is running)."
                             (if (or (zerop l) (eq ?\s (aref prompt (1- l))))
                                 "" " ")
                             (if dialog ""
-                              (substitute-command-keys
-                               (if help-form
-                                   (format "(\\`y', \\`n' or \\`%s') "
-                                           (key-description
-                                            (vector help-char)))
-                                 "(\\`y' or \\`n') ")))))))
+                              ;; Don't clobber caller's match data.
+                              (save-match-data
+                                (substitute-command-keys
+                                 (if help-form
+                                     (format "(\\`y', \\`n' or \\`%s') "
+                                             (key-description
+                                              (vector help-char)))
+                                   "(\\`y' or \\`n') "))))))))
         ;; Preserve the actual command that eventually called
         ;; `y-or-n-p' (otherwise `repeat' will be repeating
         ;; `exit-minibuffer').