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Update palindrome.py (#1509)

* Update palindrome.py

Add Doctests.

* Use test_data to drive the testing
P
percy07 committed
1ed47ad6f4b1f38d4d0a52b7f69d43c4a4294cc9
Parent: e3d4d2b
Committed by Christian Clauss <cclauss@me.com> on 10/29/2019, 10:22:49 AM