The regular expression matching in the urlAsRegex() function seems different from the old version, is bug ?

[jimhug]

Use case: description, code

3.x version：

 function urlAsRegex(urlValue) {
    return new RegExp(`(url\\(['"]?)(${util.escape(urlValue)})(['"]?\\))`, 'g')
}

2.x version

function urlAsRegex(urlValue) {
 return new RegExp(`(url\\([\'"]?)(${util.escape(urlValue)})([\'"]?\\))`, 'g');
 }

• Chrome 49+
• Firefox 45+