[1.5.x] Fixed #19700 - Added documentation for BoundField.field.
[1.5.x] Fixed #19700 - Added documentation for BoundField.field.

Thanks Tiberiu Ana for the report and patch.

Backport of fdaaa24171 from master

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