Ignore horizontal/vertical spacing when border collapse is on.
Created attachment 396977 [details] Patch
commit-queue failed to commit attachment 396977 [details] to WebKit repository.
Committed r260368: <https://trac.webkit.org/changeset/260368> All reviewed patches have been landed. Closing bug and clearing flags on attachment 396977 [details].
<rdar://problem/62060918>