title: What is &amp used for
body: <p>Is there any difference in behaviour of below URL.</p>
  
  <p>I don't know why the <code>&amp;amp;</code> is inserted, does it make any difference ?</p>
  
  <pre><code>www.testurl.com/test?param1=test&amp;amp;current=true
  </code></pre>
  
  <p>versus</p>
  
  <pre><code>www.testurl.com/test?param1=test&amp;current=true
  </code></pre>