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Add tests to morse_code.py (#5337)

* Add tests to morse_code.py

@dhruvmanila @poyea Your reviews, please.

* updating DIRECTORY.md

Co-authored-by: github-actions <${GITHUB_ACTOR}@users.noreply.github.com>
C
Christian Clauss committed
8dc7cdbc57e0a51c7ef0d6a5974d990c5f27cf4a
Parent: 433b804
Committed by GitHub <noreply@github.com> on 10/16/2021, 4:57:38 PM