master 8af91dee9a: Improve sendmail-program doc string

[Lars Ingebrigtsen]

branch: master
commit 8af91dee9a9031ac0d49848b16bd288685f1f370
Author: Lars Ingebrigtsen <larsi@gnus.org>
Commit: Lars Ingebrigtsen <larsi@gnus.org>

    Improve sendmail-program doc string
    
    * lisp/mail/sendmail.el (sendmail-program): Document that the
    program shouldn't output text (bug#56855).
---
 lisp/mail/sendmail.el | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lisp/mail/sendmail.el b/lisp/mail/sendmail.el
index f985b2ceac..189ad075c4 100644
--- a/lisp/mail/sendmail.el
+++ b/lisp/mail/sendmail.el
@@ -49,7 +49,9 @@
        ((file-exists-p "/usr/lib/sendmail") "/usr/lib/sendmail")
        ((file-exists-p "/usr/ucblib/sendmail") "/usr/ucblib/sendmail")
        (t "sendmail")))
-  "Program used to send messages."
+  "Program used to send messages.
+If the program returns a non-zero error code, or outputs any
+text, sending is considered \"failed\" by Emacs."
   :version "24.1"              ; add executable-find, remove fakemail
   :type 'file)