; Restore regexp-quote for gnus subject match

* lisp/gnus/gnus-sum.el (gnus-summary-limit-include-thread): Restore
regexp-quote that was inadvertently dropped in commit 2021-12-21 "Fix
gnus subject matching when subject is empty".

diff --git a/lisp/gnus/gnus-sum.el b/lisp/gnus/gnus-sum.el
index 769ad6d9eb1d2bba7056a87f2cfb7b848999c046..62efacfd6e205aecc50cf128908f03ddd16a86e6 100644 (file)
--- a/lisp/gnus/gnus-sum.el
+++ b/lisp/gnus/gnus-sum.el
@@ -8663,7 +8663,7 @@ these articles."
         (when matching-subject
           (gnus-summary-limit-include-matching-articles
            "subject"
-           matching-subject)
+           (regexp-quote matching-subject))
           ;; Each of the previous two limit calls push a limit onto
           ;; the limit stack. Presumably we want to think of the
           ;; thread and its associated subject matches as a single