Merge pull request facebook#5699 from jwworth/pull-request-1450702663

Fix typo (duplicate word)

Author: jimfb

docs/_posts/2015-02-18-react-conf-roundup-2015.md

@@ -4,7 +4,7 @@ layout: post
 author: steveluscher
 ---
 
-It was a privilege to welcome the React community to Facebook HQ on January 28–29 for the first-ever React.js Conf, and a pleasure to be be able to unveil three new technologies that we've been using internally at Facebook for some time: GraphQL, Relay, and React Native.
+It was a privilege to welcome the React community to Facebook HQ on January 28–29 for the first-ever React.js Conf, and a pleasure to be able to unveil three new technologies that we've been using internally at Facebook for some time: GraphQL, Relay, and React Native.
 
 ## The talks