oUpdate LinkedList.py

Fix bug - not updating tail

Otherwise if the last element is removed then future updates to the linkedlist will be erroneous

python/Chapter 2/classes/LinkedList.py

@@ -42,6 +42,8 @@ def removeNode(self, node_value):
         else:
             while(current.next != None):
                 if current.next.value == node_value:
+                    if current.next == self.tail:
+                        self.tail = current
                     current.next = current.next.next
                     break
                 else: