Honour minChildren with delete operation

[XuLei0]

In the delete function in NonLeafHelper.java, nodes.isEmpty() is used to determine whether the node needs to be deleted. Shouldn’t the node be deleted when it is smaller than minChildren? For example, when the entries in a leaf node are less than minChildren, the leaf node needs to be deleted. If the operation results in the number of non-leaf nodes in the upper layer being less than minChildren, should these non-leaf nodes and their parent nodes need to be deleted?

[davidmoten]

it does look like you are correct. I'll put this on my list for sorting out. Thanks.