We made some changes to how we serialize the transition shorthand in bug 252393, but the WPT coverage for the changes were pretty lacking. Specifically, there were no tests for the `all` and `implicit` values.
Pull request: https://github.com/WebKit/WebKit/pull/10264
Submitted web-platform-tests pull request: https://github.com/web-platform-tests/wpt/pull/38565
Committed 260500@main (1d4fb4be3f92): <https://commits.webkit.org/260500@main> Reviewed commits have been landed. Closing PR #10264 and removing active labels.
<rdar://problem/105626387>