def license_header
      IO.readlines(spec_file).take_while { |line| line.strip.empty? || line.strip.start_with?('#') }.join('')
    end
def license_header
      IO.readlines(spec_file).take_while { |line| line.strip.empty? || line.strip.start_with?('#') }.join('')
    end
License header extacted from the gemspec. Suitable for inclusion in other
 Ruby source files.

 @return [String]