Fix all JSHint complaints in Node.js code.

lib/roles/notify/hipchat.js

@@ -56,7 +56,7 @@ module.exports = function(options) {
       message: messages.join('<br>')
     , color: 'purple'
     , notify: true
-    , message_format: 'html'
+    , 'message_format': 'html'
     , token: options.token
     })
   }