title: Relative parent directory path for .gitignore
body: <p>In my sbt-project I have some files that I do not want to share with my colleagues as they are personal notes and stuff like that. I want to have them <code>.gitignore</code>d. How can I do this. I placed a folder <code>personal</code> into the project and added a .gitignore there with the line</p>
  
  <pre><code> ../personal/
  </code></pre>
  
  <p>I hoped that would hide the folder personal (including the responsible .gitignore) from git, but it seems this is not valid for git. How can I achieve this?</p>
  
  <p>Also
      /personal/
  does not work as hoped.</p>