[1.5.x] Fixed regroup example.
[1.5.x] Fixed regroup example.

Chicago was missing.

Backport of e6ff238 from master.

alx-eu/django,ccn-2m/django,alx-eu/django,imtapps/django-imt-fork,bliti/django-nonrel-1.5,ccn-2m/django,hasadna/django,imtapps/django-imt-fork,ccn-2m/django,imtapps/django-imt-fork,bliti/django-nonrel-1.5,alx-eu/django,hasadna/django,bliti/django-nonrel-1.5,alx-eu/django,ccn-2m/django,hasadna/django