CSS Grid Layout Test: '::first-line' is ignored in grid containers

The first item.

The second item.

The first item.

The second item.

Anonymous item.

Anonymous item.

The first item.

The second item.

The first item.

The second item.

Anonymous item.

Anonymous item.

The first item.

The second item.

The first item.

The second item.

Anonymous item.

Anonymous item.