title: What is the -Naur in diff program?
body: <p>I have seen that whenever we create a diff we use the following command.</p>
  
  <pre><code>diff -Naur old new &gt; file.patch
  </code></pre>
  
  <p>I was wondering what is this <code>-Naur</code> switch. How this name came and what exactly is speciality about it? Off course, I can do the diff program without Naur option to discover the difference. But, I am looking for some more information on it. </p>