title: How to write a grep that pick up specific word in the third line?
body: <p>For example if I have a doc with these 3 lines. I know <code>^feat</code> is matching the first <code>feat</code> and how can I match the third line <code>reg</code>? I tried <code>^reg</code> does not seems work.</p>
  
  <pre><code>feat(ad): make new ad
  some note here
  reg(ad): need a walk through
  </code></pre>
  
  <p>It meant to be used within a <code>.changelogrc</code> file for <a href="https://github.com/rafinskipg/git-changelog" rel="nofollow noreferrer">https://github.com/rafinskipg/git-changelog</a></p>