rails/rails — pull request #8302 by roberto (2012-11-23 20:02:48+00:00)
Title: `assert_template("")` is returning true even if a template has been rendered.

After I got a false positive using a custom rspec matcher, I've figured out that `assert_template("")` was always returning true.

Example:

```ruby
def index
render :index
end
```

```ruby
template = nil
get :index
assert_template("#{template}")
```

Change: `assert_template("")` fails if a template has been rendered, behaving like `assert_template(nil)`.