see fast/text/emphasis-avoid-ruby.html
Created attachment 469063 [details] [fast-cq]Patch
Committed 272119@main (12b180a5083b): <https://commits.webkit.org/272119@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 469063 [details].
<rdar://problem/119724155>
Re-opened since this is blocked by bug 266486