Retrigger travis

-----------------------------------------------------------
On branch master - Mon 20 Mar 2017 12:07:38 PDT by matrinox <[email protected]>

Author: matrinox

lib/redis.rb

@@ -146,9 +146,8 @@ def select(db)
   # @param [optional, String] message
   # @return [String] `PONG`
   def ping(message = nil)
-    arguments = [:ping, message].compact
     synchronize do |client|
-      client.call(arguments)
+      client.call([:ping, message].compact)
     end
   end