css bom and @charset iso15

Test passes if you see a green box.

hello

Assertion: When a stylesheet has a BOM and a @charset declaration that is not for a Unicode encoding, the stylesheet fails.

Notes:The HTML page is served as ISO 8859-15. The CSS starts with a UTF-8 signature but also has an @charset rule declaring the encoding to be ISO 8859-15. The CSS 2.1 spec says that the whole stylesheet should be abandoned in that case.
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css-encoding-018
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