Sam Atkins 8975fd7d06 LibWeb/CSS: Stop parsing media-features without parentheses ...

Our parsing code was treating `foo` and `foo: bar` as `<media-feature>`s
when really they need to be `(foo)` and `(foo: bar)` respectively. This
previously worked for the valid case because boolean expressions can
also have arbitrary `()` blocks. However, it meant we'd also allow them
without the parentheses which isn't valid.

So instead, parse and serialize the parentheses as part of the
`<media-feature>`. This gets us some WPT passes and fixes an Acid3
failure.

2026-02-05 12:22:58 +01:00

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