Questions about form binding in the documentation example

[CodeGetters]

On index.html line 48
"<p>Checked names: <pre>{{checkedNames}}</pre></p>"
my prettier is wrong: "SyntaxError: Unexpected closing tag "p". It may happen when the tag has already been closed by another tag."

This is the external link I used：https://lib.baomitu.com/vue/3.0.2/vue.global.js
IDE：VsCode 4.8.2
I hope a brother can answer it.

[CodeGetters]

Address of the problem：
https://cn.vuejs.org/examples/#form-bindings