== should format compound selectors ==
.one {}
.foo.bar {}
.foo#id {}
.class[target] {}
.class#id[target] {}
#id.class {}
#id.class[target] {}
div#thing:hover {}
div#thing::before {}
a[href='place']:hover {}
a[href='place']::before {}
.one.two.three {}
button.btn-primary {}
*#z98y {}
#one#two {}
#one.two.three {}

[expect]
.one {}

.foo.bar {}

.foo#id {}

.class[target] {}

.class#id[target] {}

#id.class {}

#id.class[target] {}

div#thing:hover {}

div#thing::before {}

a[href="place"]:hover {}

a[href="place"]::before {}

.one.two.three {}

button.btn-primary {}

*#z98y {}

#one#two {}

#one.two.three {}