[highlight-pseudos.html]
  ["::spelling-error" should be a valid selector]
    expected: FAIL

  [".a::spelling-error" should be a valid selector]
    expected: FAIL

  ["div ::spelling-error" should be a valid selector]
    expected: FAIL

  ["::part(my-part)::spelling-error" should be a valid selector]
    expected: FAIL

  ["::grammar-error" should be a valid selector]
    expected: FAIL

  [".a::grammar-error" should be a valid selector]
    expected: FAIL

  ["div ::grammar-error" should be a valid selector]
    expected: FAIL

  ["::part(my-part)::grammar-error" should be a valid selector]
    expected: FAIL