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/opt/alt/ruby27/share/ruby/csv/core_ext/

//opt/alt/ruby27/share/ruby/csv/core_ext/array.rb

 class Array # :nodoc:
  # Equivalent to CSV::generate_line(self, options)
  #
  #   ["CSV", "data"].to_csv
  #     #=> "CSV,data\n"
  def to_csv(**options)
    CSV.generate_line(self, **options)
  end
end