From 1bff87bdb7cf299c26e9f8f52eae0b1213289a65 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Mattias=20Engdeg=C3=A5rd?= <mattiase@acm.org>
Date: Thu, 5 Oct 2023 14:06:24 +0200
Subject: [PATCH] Backport commit 67977ae59 from Emacs
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* lisp/org/org.el (org-make-tags-matcher):
Apply the transform (A+B*)+ -> A(A|B)*

Eliminate some nested repetitions in regexps
67977ae5974e54d34034aa7990cf22dd162c179b
Mattias Engdegård
Sun Oct 29 17:40:36 2023 +0100
---
 lisp/org.el | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lisp/org.el b/lisp/org.el
index 3c754a239..eea91d393 100644
--- a/lisp/org.el
+++ b/lisp/org.el
@@ -11346,7 +11346,7 @@ See also `org-scan-tags'."
   (let ((match0 match)
 	(re (concat
 	     "^&?\\([-+:]\\)?\\({[^}]+}\\|LEVEL\\([<=>]\\{1,2\\}\\)"
-	     "\\([0-9]+\\)\\|\\(\\(?:[[:alnum:]_]+\\(?:\\\\-\\)*\\)+\\)"
+	     "\\([0-9]+\\)\\|\\([[:alnum:]_]\\(?:[[:alnum:]_]\\|\\\\-\\)*\\)"
 	     "\\([<>=]\\{1,2\\}\\)"
 	     "\\({[^}]+}\\|\"[^\"]*\"\\|-?[.0-9]+\\(?:[eE][-+]?[0-9]+\\)?\\)"
 	     "\\|" org-tag-re "\\)"))