Re: [csswg-drafts] [css-font] Clarify what value is invalid for font-language-override and why it shouldn't generate parse error

Some OpenType language system tags are four letters long (`IPPH`). Some include digits (`HYE0`). In principle, a tag can include any character between U+0020 and U+007E.

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Received on Sunday, 19 March 2017 14:54:39 UTC