Better assert_template output

Hey guys,

I've got a little feature request for you. The current assert_template output looks kinda like that (Rails 3.0.8)

Failure/Error: response.should render_template('pages/422')
Expected block to return true value.

And what would be cool if the output actually said which template was rendered instead of the expected one, say like that

Failure/Error: response.should render_template('pages/422')
Expected to render 'pages/422' but rendered 'sessions/new' instead

Same thing with the assert_redirect_to checks.

That could help finding out what went wrong in a controller.

Thanks, Nikolay