riddle.rb in riddle-2.2.0

- old
+ new

@@ -1,6 +1,7 @@
 require 'thread'
 require 'socket'
+require 'stringio'
 require 'timeout'
 
 module Riddle #:nodoc:
   @@mutex          = Mutex.new
   @@escape_pattern = /[\(\)\|\-!@~"&\/\?]/