# File lib/kramdown/parser/base.rb, line 116
      def extract_string(range, strscan)
        result = nil
        if RUBY_VERSION >= '1.9'
          begin
            enc = strscan.string.encoding
            strscan.string.force_encoding('ASCII-8BIT')
            result = strscan.string[range].force_encoding(enc)
          ensure
            strscan.string.force_encoding(enc)
          end
        else
          result = strscan.string[range]
        end
        result
      end