# File lib/yadis/xrires.rb, line 71
  def XRI.append_args(url, args)
    return url if args.length == 0
    
    # rstrip question marks
    rstripped = url.dup
    while rstripped[-1].chr == '?'
      rstripped = rstripped[0...rstripped.length-1]
    end
    
    if rstripped.index('?')
      sep = '&'
    else
      sep = '?'
    end
    
    return url + sep + XRI.urlencode(args)
  end