The UI steps to get the raw file appear to have changed, but when I'm looking at a certain branch or commit, I have to click the 3-dot menu at the top right of the file diff, then click "View entire file".

Once I'm at the file, I click its 3-dot menu and select "Open in Source". That should take you to a page with the committed file version, but that may not be easy to copy-paste if you need to.

To view just the file contents as text on a web page, click the 3-dot menu at the top right of the file path, then select "Open raw". This makes it easy to select all text or get the full path.