make cx_linked_list_class static

improves usage of attributes

minor code changes

implement cx_ll_insert()

implement cx_ll_remove()

remove unnecessary fields from linked list node and simplifies cx_ll_add()

Automated merge

rename test_cx_linked_list_add

remove error handling from tests

add test for cx_linked_list_add

(0) -300 -100 -10 +10 +100 +300 tip

mercurial