added docstring and comments

tests/test_update.py

@@ -0,0 +1,13 @@
+
+class TestPointsUpdate:
+
+    def test_should_not_be_ok_the_second_time(self, connect, client, club2):
+        '''
+        this books an amount of points-1 places
+        then test if 1 points remains displayed on page
+        '''
+        points = int(connect.span.text)
+        club2.update({"places": points-1})
+        response = client.post('/purchasePlaces', data=club2)
+        assert f"Great ! {points-1} places booked for {club2['competition']}" in response.data.decode()
+        print(int(connect.span.text))