title: how to insert new line after a specific character in scripts
body: <p>I have the following (example.txt) file:</p>
  
  <pre><code>blue(4) red(8) green(5) yellow(19) brown(60) black(5)
  </code></pre>
  
  <p>how can I achieve in unix the following result?</p>
  
  <pre><code>blue(4) 
  red(8) 
  green(5) 
  yellow(19) 
  brown(60) 
  black(5)
  </code></pre>