[csswg-drafts] [css-ui-4] editorial nit / agreement (#3976)

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

== [css-ui-4] editorial nit / agreement ==
https://drafts.csswg.org/css-ui/#intro

States
>[CSS-UI-3] was later introduced to incorporates, extends, and supersedes these. This specification continues this work....

This seems as if it should drop the s on each of these.. it was introduced ”to incorporate, extend and supersede.”

Please view or discuss this issue at https://github.com/w3c/csswg-drafts/issues/3976 using your GitHub account