[1.5.x] Fixed #20604 - Fixed file example in docs.
[1.5.x] Fixed #20604 - Fixed file example in docs.

Thanks Chris Lasher for the report.

Backport of a1122e14a6 from master

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