title: Why do we need file .gitignore.save?
body: <p>After changes in file <code>.gitignore</code> I noticed in my iOS repository two new files <code>.gitignore.save</code> and <code>.gitignore.save.1</code>. Actually in <code>.gitignore.save</code> I see old data of <code>.gitignore</code> file and in <code>.gitignore.save.1</code> I see actual data of <code>.gitignore</code> file.
  Please explain why these files are needed?</p>