def config_file_contents
      output = []
      output << HEADING
      output << 'linters:' if linters_with_lints.any?
      linters_with_lints.each do |linter, files|
        output << generate_config_for_linter(linter, files)
      end
      output.join("\n\n")
    end
def config_file_contents
      output = []
      output << HEADING
      output << 'linters:' if linters_with_lints.any?
      linters_with_lints.each do |linter, files|
        output << generate_config_for_linter(linter, files)
      end
      output.join("\n\n")
    end
The contents of the generated configuration file based on captured lint.

 @return [String] a Yaml-formatted configuration file's contents