通过查看扩展名，我发现了这是什么.感谢@wgj的提示.

I found out what this was by looking though the extensions. Thanks to @wgj for the hint.

原来是JS-CSS-HTML格式化程序.我仔细阅读了说明，并暂时删除了自动保存功能.我将为此制定特定的设置.

Turns out it was the JS-CSS-HTML formatter. I looked through the instructions and have removed the auto save for now. I'll have to work out the specific settings for this.

它使用js-beautify，因此如果有人知道我应该查看的设置，将不胜感激.

It uses js-beautify so if anyone knows the settings I should be looking at would be much appreciated.