[1.6.x] Fixed #23123 -- Don't use a bare except in ModelAdmin documentation
[1.6.x] Fixed #23123 -- Don't use a bare except in ModelAdmin documentation

Thanks to wkschwartz for the report and to Tim for the patch.

Backport of e5619330e2 from master

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