fix: singlelineCommentsRE incorrect matching

[YIngChenIt]

Description

const url= `http://xxxxx`;

stripLiteralRegex(url) // `http:

result of stripLiteralRegex() is unreasonable

result should be http://xxxxx

I'm investigating nuxt3

It was finally found that the reason was detectImports(unimport) deal code error

So locate here

Linked Issues

Additional context

[antfu]

Could you add a few tests for it? Thanks

[YIngChenIt]

你可以为它添加一些测试吗？谢谢

before today