[1.9.x] Fixed typo in docs/ref/template-response.txt.

If you're using middleware, the solution is easy. Middleware provides

multiple opportunities to process a response on exit from a view. If

you put behavior in the Response middleware is guaranteed to execute

you put behavior in the response middleware, it's guaranteed to execute

after template rendering has taken place.

However, if you're using a decorator, the same opportunities do not