Improve gnus thread matching of similar subjects

* lisp/gnus/gnus-sum.el (gnus-summary-limit-include-thread):
Use the more liberal gnus-general-simplify-subject regexp to
find thread articles with similar subjects.

diff --git a/lisp/gnus/gnus-sum.el b/lisp/gnus/gnus-sum.el
index ae13e7157d7aba97f9d53e444f0857b4a20cc3b5..f287bee202f150e90de764832b94625ec03cb424 100644 (file)
--- a/lisp/gnus/gnus-sum.el
+++ b/lisp/gnus/gnus-sum.el
@@ -8583,7 +8583,7 @@ article."
        (gnus-summary-limit (nconc articles gnus-newsgroup-limit))
       (gnus-summary-limit-include-matching-articles
        "subject"
-       (regexp-quote (gnus-simplify-subject-re
+       (regexp-quote (gnus-general-simplify-subject
                      (mail-header-subject (gnus-id-to-header id)))))
       (gnus-summary-position-point))))