Add doomsday algorithm (#2903)
Add doomsday algorithm (#2903)

* Added doomsday algorithm

* Adding unit-tests to doomsday algorithm

* running black on doomsday

* adding doctest and fixing a black issue [doomsday]

* Update doomsday.py

* fixing black issue [doomsday]

* Update other/doomsday.py

* Update doomsday.py

* adding more doctests (following review comment) [doomsday]

Co-authored-by: John Law <e1adba35aeac9b9dda6071c7573d8f536672d3cd@gmail.com>
TheAlgorithms/Python