[csswg-drafts] [cssom] serialising declarations with multiple components doesn't work

gsnedders has just created a new issue for https://github.com/w3c/csswg-drafts:

== [cssom] serialising declarations with multiple components doesn't work ==
See https://drafts.csswg.org/cssom/#serializing-css-values.

Given a CSS declaration of `quotes: 'a' 'b`:

Step 1 does nothing. Step 2 creates a list. Step 3 calls [serialize a CSS component value](https://drafts.csswg.org/cssom/#serialize-a-css-component-value) with `'a' 'b'`. This is nonsense because `a` `b` is not a component.

Please view or discuss this issue at https://github.com/w3c/csswg-drafts/issues/2212 using your GitHub account