[1.6.x] Fixed #22710 -- Amended aggregation note for empty QuerySets
[1.6.x] Fixed #22710 -- Amended aggregation note for empty QuerySets

Thanks smeaton for report and Joël Rochat for spell check

Backport of 7f27cca5c5 from master

redhat-openstack/django,django-nonrel/django,redhat-openstack/django,redhat-openstack/django,felixjimenez/django,django-nonrel/django,felixjimenez/django,felixjimenez/django,django-nonrel/django,felixjimenez/django,django-nonrel/django,redhat-openstack/django