Create a reference to `head` and `tail` from new_node

[jonalmeida]

Ref. src/datastructures/linkedlist.rs:144

            // FIXME Create a reference to `head` and `tail` from new_node

            // FIXME Remove placeholder linked Node for tail
            match self.tail {
…

(automatically generated by Github-Todos)

[jonalmeida]

Ref. src/datastructures/linkedlist.rs:144

//             // FIXME Create a reference to `head` and `tail` from new_node
//
//
//             // FIXME Remove placeholder linked Node for tail
…

(automatically generated by Github-Todos)