[csswg-drafts] Pull Request: [css-inline] line-height cannot have two values

ewilligers has just submitted a new pull request for https://github.com/w3c/csswg-drafts:

== [css-inline] line-height cannot have two values ==
line-height must be normal or a number or a length-percentage.

It cannot be a number followed by a length-percentage.

This brings the definition of line-height into consistency with CSS 2.
https://www.w3.org/TR/CSS2/visudet.html#propdef-line-height


See https://github.com/w3c/csswg-drafts/pull/4183