gistfile1.txt

- (void)collapseItem:(id)anItem
{
    if (!anItem)
        return;

    var itemInfo = _itemInfosForItems[[anItem UID]];

    if (!itemInfo)
        return;

    if (!itemInfo.isExpanded)
        return;

    [self _noteItemWillCollapse:anItem];
    itemInfo.isExpanded = NO;
    [self reloadItem:anItem reloadChildren:YES]; // this line and the next have been exchanged
    [self _noteItemDidCollapse:anItem];
}


- (void)expandItem:(id)anItem expandChildren:(BOOL)shouldExpandChildren
{
    var itemInfo = null;

    if (!anItem)
        itemInfo = _rootItemInfo;
    else
        itemInfo = _itemInfosForItems[[anItem UID]];

    if (!itemInfo)
        return;

    // to prevent items which are already expanded from firing notifications
    if (!itemInfo.isExpanded)
    {
        [self _noteItemWillExpand:anItem];
        itemInfo.isExpanded = YES;
        [self reloadItem:anItem reloadChildren:YES]; // this line and the next have been exchanged
        [self _noteItemDidExpand:anItem];     
    }

    if (shouldExpandChildren)
    {
        var children = itemInfo.children,
            childIndex = children.length;

        while (childIndex--)
            [self expandItem:children[childIndex] expandChildren:YES];
    }
}