title: Hide pull requests in Github
body: <p>Is there a way to only let certain teams view pull requests or specifically, to be able to view comments on pull requests? Or if not, is there a way to hide the comments on an individual pull request to everyone but a select few individuals?</p>
  
  <p>I am a TA, and our current practice is to have all students submit pull requests that contain their test answers. Then, I write comments on their pull request regarding their scores on each question. I would prefer the tests are not visible to other students, but at the very least I would like these comments to not be visible to the other students but to be visible to other instructors (on a separate team).</p>