def process_files(report)
      files.each do |file|
        process_file(file, report)
        break if report.failed? && fail_fast?
      end
    end
def process_files(report)
      files.each do |file|
        process_file(file, report)
        break if report.failed? && fail_fast?
      end
    end
Process the files and add them to the given report.

 @param report [HamlLint::Report]
 @return [void]