bash-3.2$ git log -1
commit 413ef5a7e664d84415eae00e491e2a14a6018265 (HEAD -> master, origin/master, origin/HEAD)
Author: Andrew G Cohen <cohen@andy.bu.edu>
Date: Fri Mar 25 16:06:34 2022 +0800
; 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".