[parsing.html]
  [.foo { + .bar, .foo, > .baz { color: green; }}]
    expected: FAIL

  [.foo { .foo { color: green; }}]
    expected: FAIL

  [.foo { .foo, .foo & { color: green; }}]
    expected: FAIL

  [.foo { :is(.bar, .baz) { color: green; }}]
    expected: FAIL