format_arguments

# File activerecord/lib/active_record/migration.rb, line 1145
      def format_arguments(arguments)
        arg_list = arguments[0...-1].map(&:inspect)
        last_arg = arguments.last
        if last_arg.is_a?(Hash)
          last_arg = last_arg.reject { |k, _v| internal_option?(k) }
          arg_list << last_arg.inspect unless last_arg.empty?
        else
          arg_list << last_arg.inspect
        end
        arg_list.join(", ")
      end