This change make css property 'shape-outside' not include 'margin-box' in serialization result because it is implied.
*** Bug 261904 has been marked as a duplicate of this bug. ***
I have a patch for this.
<rdar://problem/115938310>
Pull request: https://github.com/WebKit/WebKit/pull/18123
Committed 268365@main (5e57291ddc43): <https://commits.webkit.org/268365@main> Reviewed commits have been landed. Closing PR #18123 and removing active labels.
Ah, you already reported the same bug. Thank you for closing this one:)