From: Andrea Corallo <acorallo@gnu.org>
Date: Tue, 30 Apr 2024 07:19:31 +0000 (+0200)
Subject: * lisp/emacs-lisp/regexp-opt.el (regexp-opt): Fix type declaration.
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* lisp/emacs-lisp/regexp-opt.el (regexp-opt): Fix type declaration.
---

diff --git a/lisp/emacs-lisp/regexp-opt.el b/lisp/emacs-lisp/regexp-opt.el
index 076232bc613..f23343a34c6 100644
--- a/lisp/emacs-lisp/regexp-opt.el
+++ b/lisp/emacs-lisp/regexp-opt.el
@@ -130,7 +130,7 @@ usually more efficient than that of a simplified version:
      (concat (car parens)
              (mapconcat \\='regexp-quote strings \"\\\\|\")
              (cdr parens))))"
-  (declare (type (function (list) string))
+  (declare (type (function (list &optional t) string))
            (pure t) (side-effect-free t))
   (save-match-data
     ;; Recurse on the sorted list.