title: Read a file and replace certain line with a new one
body: <p>I want to:</p>
  
  <ul>
  <li>Read a file, </li>
  <li>Find a line that starts with certain word</li>
  <li>Replace that line with a new one</li>
  </ul>
  
  <p>Is there an efficient way of doing this using Java 8 Stream please? </p>