Checklist

• I have verified that that issue exists against the master branch of Django REST framework.
• I have searched for similar issues in both open and closed tickets and cannot find a duplicate.
• This is not a usage question. (Those should be directed to the discussion group instead.)
• This cannot be dealt with as a third party library. (We prefer new functionality to be in the form of third party libraries where possible.)
• I have reduced the issue to the simplest possible case.
• I have included a failing test as a pull request. (If you are unable to do so we can still accept the issue.)

Steps to reproduce

Visit http://www.django-rest-framework.org/api-guide/responses/#data

Expected behavior

The description of .data should be accurate

Actual behavior

The attribute .data is described as the unrendered content of a Request object when it's referred above as the serialized content of the response.

ref #5361