1. Added failing test for "should do display a two dependencies"
2. General clean-up.
Made sure the test "should do display two dependencies" passed.
Refactored the code to make it cleaner.
Made sure the "should display three dependencies" test passed
General clean-up
Got the "should display the example provided" spec to pass.
Realised that we need a space in the tree.
Realised that we need a space in the tree.