<noscript> content html-escaped despite it's marked safe

Django template

``` html

{{ code|safe }}
```

Template output with htmlmin middlewares added to `settings.MIDDLEWARE_CLASSES`

``` html

<iframe src="https://..."></iframe>
```

Template output after removing htmlmin middlewares:

``` html

```

Reproduce the issue with a Django template using {{ code|safe }} and the htmlmin middleware configured in settings.MIDDLEWARE_CLASSES. Trace how the middleware handles noscript content, then verify that markup inside a safe noscript value remains unescaped while ordinary HTML is still minified.

Written by the indexing model from the issue text.