message: Update binary-search-tree-iterator-ii.cpp
diff: @@ -24,9 +24,9 @@ public:
  int next() {
  if (++pos_ == size(vals_)) {
  - TreeNode *curr = stk_.back(); stk_.pop_back();
  - traverseLeft(curr->right);
  - vals_.emplace_back(curr->val);
  + TreeNode *node = stk_.back(); stk_.pop_back();
  + traverseLeft(node->right);
  + vals_.emplace_back(node->val);
  }
  return vals_[pos_];
  }
  