Object.in?でArgumentErrorが発生した場合の対処（Rails3 => Rails4) ref: http://qiita.com/Oakbow/items/f1d3f2b69fd056488162

file0.txt

ArgumentError - wrong number of arguments (2 for 1):

inclusion.rb

  # Returns true if this object is included in the argument. Argument must be
  # any object which responds to +#include?+. Usage:
  #
  #   characters = ["Konata", "Kagami", "Tsukasa"]
  #   "Konata".in?(characters) # => true
  #
  # This will throw an ArgumentError if the argument doesn't respond
  # to +#include?+.
  def in?(another_object)
    another_object.include?(self)
  rescue NoMethodError
    raise ArgumentError.new("The parameter passed to #in? must respond to #include?")
  end

object_in.rb

object.in?('hogehogehoge', 'fugafugafuga')
    ↓
object.in?(['hogehogehoge', 'fugafugafuga'])