title: Assistant editor is showing two different version of same file
body: <p>I'm connecting some <code>UIControles</code> to its <code>IBOutlet</code> object in .h file using drag and drop.</p>
  
  <p>After connecting i found that those <code>IBoutlet</code> Objects are there in .h file, when i'm opening it on right panel of assistant editor.but same objects are not coming when i'm opening it on left panel as given in image <img src="https://i.stack.imgur.com/t4u5r.png" alt="enter image description here"> </p>
  
  <p>But after some time i found that it has two version of same file as shown in following image
  <img src="https://i.stack.imgur.com/w0lzw.png" alt="enter image description here"></p>
  
  <p>I filtered the file name in project navigator by its name but its showing only one file of that name</p>
  
  <p><img src="https://i.stack.imgur.com/el19p.png" alt="enter image description here"></p>
  
  <p><strong>What have i tried</strong>:i have cleaned it many times,and i have restarted Xcode many times. </p>