Handle overlapping appointments in appt.el (bug#8377)

* lisp/calendar/appt.el (appt-disp-window-function): Doc fix.
(appt-check): Handle overlapping appointments.

* etc/NEWS: Mention appt-disp-window-function should handle lists now.

1 files changed, 5 insertions, 0 deletions

diff --git a/etc/NEWS b/etc/NEWS
index 51b179d8ddc..dad42e14f02 100644
--- a/etc/NEWS
+++ b/etc/NEWS
@@ -511,6 +511,11 @@ See the variable `diary-comment-start'.
 *** Appointments can specify their individual warning times.
 See the variable `appt-warning-time-regexp'.
 
+---
+*** The function specified by `appt-disp-window-function' may be passed
+lists of arguments if multiple appointments are due at similar times.
+If you are using a custom function for this, you should update it.
+
 +++
 *** New function `diary-hebrew-birthday'.