Separate from updateComment because re-anchoring is mechanical — the
content moved under the comment — rather than something a person wrote, so it
leaves lastEditedAt alone. The API resolves the new anchor into a selection,
so the change shows up on selection once the write lands.
Re-anchors a comment to a different run of text.
Separate from updateComment because re-anchoring is mechanical — the content moved under the comment — rather than something a person wrote, so it leaves
lastEditedAtalone. The API resolves the new anchor into a selection, so the change shows up onselectiononce the write lands.