# File lib/yard/templates/helpers/html_helper.rb, line 412
      def charset
        return 'utf-8' unless RUBY19 || lang = ENV['LANG']
        if RUBY19
          lang = Encoding.default_external.name.downcase
        else
          lang = lang.downcase.split('.').last
        end
        case lang
        when "ascii-8bit", "us-ascii", "ascii-7bit"; 'iso-8859-1'
        else; lang
        end
      end