* Comparison callback. Must return < 0, 0, or > 0 if the first argument
* is less than, equal to, or greater than the second argument,
* respectively. The first argument will be @cmp_ctx and the second
- * argument will be a pointer to the AVL tree node contained in the item
- * inserted into the AVL tree.
+ * argument will be a pointer to the AVL tree node of an item in the tree.
*
* Returns a pointer to the AVL tree node embedded in the resulting item, or
* NULL if the item was not found.