[1.7.x] Fixed #22167 -- Improved documentation on context processors
[1.7.x] Fixed #22167 -- Improved documentation on context processors

Backport of e7ffba8f78849fbf60b98fb8d67ef4577b585e3b from master.

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