CPTreeNode.j:
* Correct index calculations in insertObject:inChildNodesAtIndex: and replaceObjectInChildNodesAtIndex:withObject:. Nodes no longer misplace during same-parent or cross-parent moves.
* Update _removeChildNode: to call removeObjectFromChildNodesAtIndex:. This ensures detaches notify childNodes observers on the original parent.
CPTreeNodeTest.j:
* Add test coverage for same-parent replacement, cycle rejection on replace-path, KVO during cross-parent moves, mutableChildNodes proxy operations, insertion bounds, non-recursive sorting, isLeaf, and descendantNodeAtIndexPath: edge cases.
* Disable same-parent childNodes KVO test. CPKeyValueObserving.j coalesces nested change notifications on the same key, which drops the inner removal event.
* Disable parentNode KVO test. No setParentNode: method exists to instrument.
* Add inline comments to both disabled tests explaining these mechanisms.
David Richardson
3a140b07fe