Uzair rehman

Results 3 issues of Uzair rehman

https://github.com/cstack/db_tutorial/blame/bd4b1ee536c91cdd446251e1b9a71a4b06c4efb0/_parts/part14.md#L366

https://github.com/cstack/db_tutorial/blame/bd4b1ee536c91cdd446251e1b9a71a4b06c4efb0/_parts/part14.md#L365

After updating get_node_max_key you should see the othere functiosn that are using the function like leaf_node_split_and_insert this function needs to be updated because it is still using the old definition...