title: Never merge specific folder into any other branches?
body: <p>I want to have a three branch setup on my repository:</p>
  
  <ul>
  <li>Master</li>
  <li>Upcoming</li>
  <li>Develop</li>
  </ul>
  
  <p>"Develop" will be where on-going development is taking place. In this develop branch, I would like to have my unit tests, but I want to keep the unit tests out of the other two branches. So, ideally, I want the "tests" folder within the develop branch to never be merged into any other branch. Is this possible?</p>