Pseudo-class :has issues when used with html tag descendant selectors

[jbest84]

Describe the bug
Descendant selectors used in pseudo-class :has are incorrectly minified when the selector is an html tag

To Reproduce

var result1 = Uglify.Css(".foo:has(span span)");
Console.WriteLine(result1.Code);

Minified output or stack trace

.foo:has(spanspan)

Excepted output code

.foo:has(span span)