Clarifies why render() does not return a TemplateResponse object.

[johannes-gehrs]

See issue: https://code.djangoproject.com/ticket/21580#ticket

[timgraham]

To say "In some cases" without giving an example leaves me wondering why I'd want to use TemplateResponse over HttpResponse. I guess I could check the documentation about it, but I'd either given an example here or just say something like "If you wish to use TemplateResponse ..."

[timgraham]

Thanks for the contribution. I've left some suggestions above. Please also remove trailing whitespace from your patch (if possible, configure your editor to do that when saving a file if you wish).

[johannes-gehrs]

Thanks for your feedback.

I have accidentally messed up the history of this pull request in git.

However, I have now removed trailing whitespace and I have modified the commit as per your suggestion. I think the information is now a little more concise and clear.

[timgraham]

merged in f685f94. For future reference, please note our commit message guidelines. Thanks!