.

wcfs/δbtail.go

@@ -968,7 +968,7 @@ func diffT(ctx context.Context, A, B *Tree, δZTC SetOid, trackSet PPTreeSubSet,
 	// by default a node contributes to δ-
 	// a node ac does not contribute to δ- and can be skipped, if:
 	// - ac is not tracked, or
-	// - ac ∉ δZTC && ∃ bc from B: ac.oid == bc.oid	(ac was not changed and stays in the tree)
+	// - ac ∉ δZTC && ∃ bc from B: ac.oid == bc.oid	(ac+ac.children were not changed, and ac stays in the tree)
 	Aq := []*nodeInRange{atop} // queue for A nodes that contribute to δ-
 	for len(Aq) > 0 {
 		tracef("\n")