[PATCH] test/emacs: mark one test as fixed in newer emacs.

[David Bremner <david@tethera.net>]

The remaining problem in this test is fixed upstream in Emacs
28. While most people are using earlier versions of emacs, the test
still provides some documentation of a known bug.
---
 test/T450-emacs-show.sh | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/test/T450-emacs-show.sh b/test/T450-emacs-show.sh
index 4b5f5fde..2a192ed0 100755
--- a/test/T450-emacs-show.sh
+++ b/test/T450-emacs-show.sh
@@ -220,7 +220,9 @@ test_emacs '(notmuch-show "id:basic-encrypted@crypto.notmuchmail.org")
 test_expect_equal_file $EXPECTED/notmuch-show-decrypted-message OUTPUT
 
 test_begin_subtest "show encrypted rfc822 message"
-test_subtest_known_broken
+if ${TEST_EMACS} --quick --batch --eval '(if (version< emacs-version "28") (kill-emacs 0) (kill-emacs 1)))'; then
+    test_subtest_known_broken
+fi
 test_emacs '(notmuch-show "id:encrypted-rfc822-attachment@crypto.notmuchmail.org")
             (test-visible-output)'
 test_expect_code 1 'fgrep "!!!" OUTPUT'
-- 
2.33.0