title: Why I see in Git an added folder as a unique file
body: <p>I have a project on my git repo. </p>
  
  <p>I add a submodule (a project in github) to this project. And when I do <code>git status</code> I see the complete added project with all of its content as a file, and not as diferent files. Why happens this?</p>
  
  <p><img src="https://i.stack.imgur.com/J61gd.png" alt="the folder as file"></p>