title: CoreData model file opens as XML file
body: <p>After resolving some conflict after a merge, when I choose the Data Model file in xcode, it shows me the file as XML and not with the regular interface:</p>
  <p><a href="https://i.stack.imgur.com/dvVBZ.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/dvVBZ.png" alt="enter image description here" /></a></p>
  <p><a href="https://i.stack.imgur.com/qtJfP.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/qtJfP.png" alt="enter image description here" /></a></p>
  <p>The project does compile and run.</p>
  <p><strong>EDIT</strong>: If I copy the file and open it from desktop using xcode, it opens with the interface as suppose to.</p>