fix: correct DATE DTEND values - they are non-inclusive (ietf-tools#6907)

Author: rjsparks

ietf/doc/templatetags/ietf_filters.py

@@ -539,6 +539,10 @@ def ics_date_time(dt, tzname):
         return f':{timestamp}Z'
     else:
         return f';TZID={ics_esc(tzname)}:{timestamp}'
+    
+@register.filter
+def next_day(value):
+    return value + datetime.timedelta(days=1)
 
 
 @register.filter

ietf/templates/meeting/upcoming.ics

@@ -25,7 +25,7 @@ SUMMARY:IETF {{ meeting.number }}{% if meeting.city %}
 LOCATION:{{ meeting.city }},{{ meeting.country }}{% endif %}
 CLASS:PUBLIC
 DTSTART;VALUE=DATE{% if meeting.time_zone %};TZID={{ meeting.time_zone|ics_esc }}{% endif %}:{{ meeting.date|date:"Ymd" }}
-DTEND;VALUE=DATE{% if meeting.time_zone %};TZID={{ meeting.time_zone|ics_esc }}{% endif %}:{{ meeting.end_date|date:"Ymd" }}
+DTEND;VALUE=DATE{% if meeting.time_zone %};TZID={{ meeting.time_zone|ics_esc }}{% endif %}:{{ meeting.end_date|next_day|date:"Ymd" }}
 DTSTAMP{% ics_date_time meeting.cached_updated|utc 'utc' %}
 URL:{{ request.scheme }}://{{ request.get_host }}{% url 'agenda' num=meeting.number %}
 END:VEVENT