Embedded javascript string with `//` have unexpected behavrio

[alexr00]

Original from @Namorzyny in https://github.com/microsoft/vscode/issues/105779

Steps to Reproduce:

1. Input some code like: <input type="button" value="text" onclick="location.href='https://www.google.com'">
2. The code will display as a comment:

This only occurs if the // is in the string. The character before the // will get invalid.illegal.newline.js.

[alexr00]

This issue doesn't occur with just the javascript grammar, only when its embedded like this.

[alexr00]

Thanks to some investigation from @mjbvz, the issue appears to be here: https://github.com/textmate/html.tmbundle/blob/0c3d5ee54de3a993f747f54186b73a4d2d3c44a2/Syntaxes/HTML.plist#L341-L359

Original comment is https://github.com/microsoft/vscode/issues/112189#issuecomment-742157879

[rahul3v]

Well, same will happen when you use /* as well