fix docstring

billard/utils.py

@@ -2,18 +2,17 @@ from datetime import datetime, date, time
 
 
 def get_prize_for(start, end=datetime.now(), pph=0):
-    '''
+    """
     calculate prize of billard table rental
 
     :param start: start datetime of rental
     :param end: end datetime of rental
     :param pph: prize per hour of rental
     :return: the calculated prize of rental
-    '''
+    """
     pps = pph / 3600
     time = (end - start).seconds
     prize = round((pps * time), 1)
-    print(prize)
     return prize