title: Add a character to each line
body: <p>I have the text in this format</p>
  
  <pre><code> Man like dog.
   Man like to drink.
   Man is the king
  </code></pre>
  
  <p>I want to add a character say ???? to each line in the above text so that the output can look like:</p>
  
  <pre><code> ????Man like dog.
   ????Man like to drink.
   ????Man is the king
  </code></pre>
  
  <p>Can you help me how to do that?</p>