After fixing bug 246600 there is this loose end. We should not serialize " / normal" for line-height even in specified style.
The tests are unambiguous about this, although the standard is a little bit ambiguous. Either way, this should be straightforward.
<rdar://problem/101487839>
Pull request: https://github.com/WebKit/WebKit/pull/5733
Committed 255993@main (1d29cf3005f2): <https://commits.webkit.org/255993@main> Reviewed commits have been landed. Closing PR #5733 and removing active labels.