title: how to customize wordpress internal functions, like adjacent_post_link()
body: <p>I need to customize the <code>previous_post_link()</code> and <code>next_post_link()</code> on WordPress.</p>
  
  <p>Per example, I want to shrink permalinks like "Top 5 programming languages that you need to learn" to "Top 5 programing...".</p>
  
  <p>The function responsible for creating the link <code>isadjacent_post_link()</code> located at <code>wp-includes/link-template.php</code></p>