title: How to add new line using sed on MacOS?
body: <p>I wanted to add a new line between <code>&lt;/a&gt; and &lt;a&gt;&lt;a&gt;</code></p>
  
  <pre><code>&lt;/a&gt;&lt;a&gt;&lt;a&gt;
  
  &lt;/a&gt;
  &lt;a&gt;&lt;a&gt;
  </code></pre>
  
  <p>I did this</p>
  
  <p><code>sed 's#&lt;/a&gt;&lt;a&gt;&lt;a&gt;#&lt;/a&gt;\n&lt;a&gt;&lt;a&gt;#g' filename</code> but it didn't work.</p>