title: Report Builder Export to CSV with colum header spaces
body: <p>This is a strange request as we all know that database headers should never contain spaces. 
  However a system that I am using requires spaces in its headers to import. 
  I have created a Report Builder report that builds the data into a table and works when I run it. </p>
  
  <pre><code> '01/08/2015' "Active date",
   '31/07/2016' "Expiry date",
  </code></pre>
  
  <p>However when this is exported to a CSV file the are replaced with "Active_date" which causes an error on import. Does anyone know a way I can stop it from replacing spaces with _ or is this something that cannot be altered?</p>