There's no need to do that as the raw HTML can be seen here:

In this case the browser fails to render the page because the server sends a Content-Type: text/plain in the http header instead of Content-Type: text/html as it would be expected.

Maybe this save-to-disk-and-reopen step is not the most elegant way to solve this, but it is the most simple trick that at least I can imagine. And it helps here too.