This change was committed on Jun 14th 2013, about a week after the PRISM programme had been leaked by Edward Snowden. It is a clear reference to the programme but by this point it was already public knowledge.<p>I don&#x27;t know the exact date that Snowden leaked PRISM but it was already being talked about as early as June 6th 2013 in the Washington Post <a href="http:&#x2F;&#x2F;www.washingtonpost.com&#x2F;wp-srv&#x2F;special&#x2F;politics&#x2F;prism-collection-documents&#x2F;" rel="nofollow">http:&#x2F;&#x2F;www.washingtonpost.com&#x2F;wp-srv&#x2F;special&#x2F;politics&#x2F;prism-...</a>