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

>From the OpenType spec:

> All tags are 4-byte character strings composed of a limited set of ASCII characters in the range 0x20 to 0x7E. Spaces (0x20) may only occur as a trailing sequence within the tag. As a general convention, capital letters (0x41 to 0x5A) are used. If a language system tag consists of three or less visible letters, the letters are followed by the requisite number of spaces each consisting of a single byte, to complete a 4-byte tag. 
> https://www.microsoft.com/typography/otspec/languagetags.htm

That seems abundantly clear, and we already link to that definition.

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Received on Wednesday, 14 February 2018 19:20:58 UTC