title: Fiddler output has unknown prefix and postfix
body: <p>When i compose a POST request on my web service using Fiddler Web Debugger (v4.5.1.2), the expected output does always have a prefix and postfix. </p>
  
  <p><strong>In this case: 23b &amp; 0</strong>.</p>
  
  <p>Top screen: (geojson) input, bottom screen: output.</p>
  
  <p><img src="https://i.stack.imgur.com/7HEWB.png" alt="enter image description here"></p>
  
  <p>Anyone an idea why this is and how to get rid of it?
  When i generate output in Eclipse, the prefix/postfix are not shown.</p>
  
  <p>Cheers!</p>