Linked list resubmit

[kurtrm]

Addressed the following comments:
[X] The push method should be able to store any kind of val, not raise an error if I try to input 'True'.

[X] There should be a method called size, that returns the size of the list. You have only implemented the len method that does this. Just make a size method that returns the same thing as the len.

[X] Your remove method is not working correctly. It is should raise a ValueError if it can't find the node it wants to remove. Also the logic in the while loop is incorrect, more importantly the assignment says that the remove method takes a node, not a value of a node as an arg.

[X] Your display method return '(:, I, f, a)' when it should return "(':', 'I', 'f', 'a')"

As with the previous resubmits, tox and coverage are focused on the linked list data structure alone.