title: woocommerce_single_product_summary replace
body: <p>I've tried to replace the content of single product page summary without success. All I could achieve so far is adding to the content using a filter:</p>
  
  <pre><code>add_filter( 'woocommerce_single_product_summary', 'my_custom_action', 20 );
      function my_custom_action()
      {
          echo '&lt;p&gt;This is my custom action function&lt;/p&gt;';
      }
  </code></pre>
  
  <p>What function can I use to replace the content rather then adding to it?</p>
  
  <p>Thanks,
  ukw.</p>