Removed pub from BinarySearchTreeIter since the struct is not public …

…and it should only be created from inside the module itself.

src/data_structures/binary_search_tree.rs

@@ -426,7 +426,7 @@ impl<'a, T> BinarySearchTreeIter<'a, T>
 where
  T: Ord,
 {
- pub fn new(tree: &BinarySearchTree<T>) -> BinarySearchTreeIter<T> {
+ fn new(tree: &BinarySearchTree<T>) -> BinarySearchTreeIter<T> {
  let mut iter = BinarySearchTreeIter { stack: vec![tree] };
  iter.stack_push_left();
  iter