Convert Tempfile to binary using binmode

s3.rb

      # Returns representation of the data of the file assigned to the given
      # style, in the format most representative of the current storage.
      def to_file style = default_style
        return @queued_for_write[style] if @queued_for_write[style]
        filename = path(style)
        extname  = File.extname(filename)
        basename = File.basename(filename, extname)
        file = Tempfile.new([basename, extname])
        file.binmode # Added
        file.write(AWS::S3::S3Object.value(path(style), bucket_name))
        file.rewind
        return file
      end