- style cleanup

- Add MultiQueue#<< alias to #push

lib/logstash/multiqueue.rb

@@ -1,13 +1,19 @@
 class MultiQueue
+  public
   def initialize(*queues)
     @mutex = Mutex.new
     @queues = queues
   end
 
+  # Push an object to all queues.
+  public
   def push(object)
     @queues.each { |q| q.push(object) }
   end
 
+  alias_method :<<, :push
+
+  # Add a new Queue to this queue.
   public
   def add_queue(queue)
     @mutex.synchronize do