The tests in imported/w3c/web-platform-tests/css/css-text/white-space/control-chars-* have been updated to be ref-mismatch tests that test that control characters are rendered as something and don't just disappear, and as a result these now fail on GTK and WPE, because for the most part they render as nothing.
Created attachment 436202 [details] Patch
/Volumes/Data/worker/Commit-Queue/build/LayoutTests/ChangeLog neither lists a valid reviewer nor contains the string "Unreviewed" or "Rubber stamp" (case insensitive).
Created attachment 436220 [details] Patch
Committed r281464 (240843@main): <https://commits.webkit.org/240843@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 436220 [details].
<rdar://problem/82257892>
Reopening to track the fix for this.