Add tests to data_structures/linked_list/swap_nodes.py #10751
Merged
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Describe your change:
This PR adds Doctest to the swap node file under the Linkedlist data structure to increase its test coverage.
Also manipulated the Linkedlist print_list function in the same file to not output a blank space behind its output so as not to raise errors for doctest outputs that do not include an empty space.
Tested this change locally and verified that they are passing.
Checklist: