Rename encapsulation as cards

As mentioned in #19.

I’ve not checked if I have broken anything. It would be good if someone confident with Python could check it still runs before merging.

exercises/python/cards/encapsulation.py → exercises/python/cards/cards.py

@@ -1,10 +1,10 @@
-class Encapsulation:
+class Cards:
     def __init__(self):
         pass
 
     def runner(self):
-        encapsulation = Encapsulation()
-        deck_in_order = encapsulation.get_cards()
+        cards = Cards()
+        deck_in_order = cards.get_cards()
         for card in deck_in_order:
             print(card)
 
@@ -46,5 +46,5 @@ def get_cards(self):
 
         return result
 
-encapsulation = Encapsulation()
-encapsulation.runner()
+cards = Cards()
+cards.runner()

exercises/python/cards/test_encapsulation.py

@@ -1,12 +1,12 @@
 import unittest
-from encapsulation import Encapsulation
+from cards import Cards
 
 
-class EncapsulationTest(unittest.TestCase):
+class CardsTest(unittest.TestCase):
 
     def test_get_deck_in_order_return_52_cards_correctly_formatted(self):
-        encapsulation = Encapsulation()
-        self.assertEqual(encapsulation.get_cards(), [
+        cards = Cards()
+        self.assertEqual(cards.get_cards(), [
             "ace of clubs",
             "2 of clubs",
             "3 of clubs",