Add the last call expiration date to the document header,

and remove duplicate code for producing the iest state summary.
 - Legacy-Id: 6612

Author: JoelHalpern

ietf/doc/views_doc.py

@@ -140,13 +140,7 @@ def document_main(request, name, rev=None):
 
         iesg_state = doc.get_state("draft-iesg")
         iesg_substate = doc.tags.filter(slug__in=IESG_SUBSTATE_TAGS)
-        if iesg_state:
-            iesg_state_summary = iesg_state.name
-            if iesg_substate:
-                iesg_state_summary = iesg_state_summary + "::"+"::".join(tag.name for tag in iesg_substate)
-        else:
-            iesg_state_summary = None
-
+        iesg_state_summary = doc.friendly_state()
         can_edit = has_role(request.user, ("Area Director", "Secretariat"))
         stream_slugs = StreamName.objects.values_list("slug", flat=True)
         can_change_stream = bool(can_edit or (