minor typos in application using workflow - better error messages?

[JezC]

Hi - beginner error here... but an uninformative diagnostic error message. I accidentally typed "transition_to" instead of "transitions_to". Which provokes a message about an undefined method "to_sym" for nil.Class. Not very obvious that there's a missing required parameter...
Can I suggest a one liner enhancement to the initialize function?

def initialize(name, transitions_to, meta = {}, &action)
  raise "missing 'transitions_to' from workflow for '#{name}'" if transitions_to == nil 
  @name, @transitions_to, @meta, @action = name, transitions_to.to_sym, meta, action
end

[geekq]

Added a better message. Additionally added :transition_to alias to avoid the problem in the first place.