fu_check_options(options, optdecl) private

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# File lib/fileutils.rb, line 1450
  def fu_check_options(options, optdecl)   #:nodoc:
    h = options.dup
    optdecl.each do |opt|
      h.delete opt
    end
    raise ArgumentError, "no such option: #{h.keys.join(' ')}" unless h.empty?
  end
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