# File lib/travis/tools/formatter.rb, line 23
      def file_size(input, human = true)
        return "#{input} B" unless human
        format = "B"
        iec    = %w[KiB MiB GiB TiB PiB EiB ZiB YiB]
        while human and input > 512 and iec.any?
          input /= 1024.0
          format = iec.shift
        end
        input = input.round(2) if input.is_a? Float
        "#{input} #{format}"
      end