The "Imperative Slot API" entry is in the specifications section while referencing a different specification. It needs to be moved to the "features" list.
Pull request: https://github.com/WebKit/WebKit/pull/3254
Committed 253360@main (5299620be26d): <https://commits.webkit.org/253360@main> Reviewed commits have been landed. Closing PR #3254 and removing active labels.
<rdar://problem/98544271>