fn format_txt filepath filetext =(    if doesFileExist filepath == true         then    (        fin = openfile filepath mode:"r+"        seek fin #eof        txt = filetext + "\n"        format txt to:fin        close fin    )    else    (        newfile = createFile filepath        close newfile        format_txt filepath filetext        )    )  -- 逐行写入文本format_txt "C:\Users\Administrator\Desktop\2.txt" "你好MAXScript"