[1.7.x] Fixed #23965 -- Mentioned that FieldFile inherits from File
[1.7.x] Fixed #23965 -- Mentioned that FieldFile inherits from File

Backport of 5281d9620d13386fd4403f7aa6b9a2afd9b5a93f from master

jyotsna1820/django,jyotsna1820/django,oscaro/django,jyotsna1820/django,oscaro/django,oscaro/django,jyotsna1820/django,oscaro/django