参考链接：
在CSDN上copy别人的代码到pycharm，空格变成了[NBSP]_pycharm nbsp-CSDN博客https://blog.csdn.net/weixin_40912987/article/details/117661447#:~:text=%E5%88%86%E4%BA%AB%E5%A6%82%E4%BD%95%E5%9C%A8CSDN%E5%A4%8D%E5%88%B6%E4%BB%A3%E7%A0%81%E5%88%B0PyCharm%E6%97%B6%E9%81%87%E5%88%B0%E7%9A%84NBSP%E5%AD%97%E7%AC%A6%E9%97%AE%E9%A2%98%EF%BC%8C%E9%80%9A%E8%BF%87%E7%AE%80%E5%8D%95%E6%93%8D%E4%BD%9C%E8%A7%A3%E5%86%B3%E7%A9%BA%E6%A0%BC%E6%98%BE%E7%A4%BA%E5%BC%82%E5%B8%B8%EF%BC%8C%E7%A1%AE%E4%BF%9D%E4%BB%A3%E7%A0%81%E6%A0%BC%E5%BC%8F%E6%AD%A3%E7%A1%AE%E3%80%82%20%E6%88%91%E5%88%9A%E5%BC%80%E5%A7%8B%E5%85%88%E5%B0%86%E4%BB%A3%E7%A0%81%E7%B2%98%E8%B4%B4%E5%88%B0%E7%AC%94%E8%AE%B0%E6%9C%AC%E4%B8%8A%EF%BC%8C%E5%86%8D%E4%BB%8E%E7%AC%94%E8%AE%B0%E6%9C%AC%E4%B8%8A%E5%A4%8D%E5%88%B6%E8%BF%87%E5%8E%BB%E4%B9%9F%E8%BF%98%E6%98%AF%E4%B8%80%E6%A0%B7%E7%9A%84%E6%83%85%E5%86%B5%E3%80%82%20%E3%80%90%E4%B8%8D%E8%A1%8C%E3%80%91,%E5%A4%8D%E5%88%B6%20%5BNBSP%5D%E8%BF%99%E4%B8%AA%E5%A5%87%E6%80%AA%E7%9A%84%E4%B8%9C%E8%A5%BF%EF%BC%8C%EF%BC%88%E5%89%AA%E8%B4%B4%E6%9D%BF%E6%98%BE%E7%A4%BA%E7%9A%84%E5%85%B6%E5%AE%9E%E8%BF%98%E6%98%AF%E7%A9%BA%E6%A0%BC%EF%BC%89%EF%BC%8C%E6%8C%89%E4%BD%8FCTRL%2BR%EF%BC%8C%E4%B8%8A%E9%9D%A2%E7%9A%84%E6%98%AF%E4%B8%80%E4%B8%AA%E7%A9%BA%E6%A0%BC%EF%BC%88%E4%BA%8B%E5%85%88%E5%A4%8D%E5%88%B6%E7%9A%84NBSP%EF%BC%89%EF%BC%8C%E4%B8%8B%E9%9D%A2%E4%B8%8D%E8%A6%81%E5%A1%AB%EF%BC%8C%E6%9B%BF%E6%8D%A2%E6%89%80%E6%9C%89%E7%9A%84%E3%80%82%20%E7%9B%B8%E5%BD%93%E4%BA%8E%E6%8A%8ANBSP%E5%88%A0%E9%99%A4%E3%80%82%20over%E3%80%82
在idea，键盘ctrl + R
复制NBSP，替换成四个空格， replace all。
