Did GitHub remove the raw diff

I'm either going crazy, or GitHub removed/moved the raw diff ability. You used to be able to get a raw diff from a PR by just adding ".diff" to the url, but it appears it doesn't work anymore.

I generally use this when receiving a PR and don't want to go through the hassle of checking out their branch, so I would just grab the raw diff and apply it locally. This seems to have gone away though.

Is this a bug or something? Has anyone else noticed this issue and found a work around?