[1.7.x] Fixed a typo in the test responses docs.
[1.7.x] Fixed a typo in the test responses docs.

Backport of 996292d6498d25c6b3e84435e82edeff5aaa0257 from master

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