Adopted new convention from template

src/Python/Problems001-050/Problem020.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python3
+#!/usr/bin/env python
 """
 Created on 15 Sep 2018
 
@@ -10,26 +10,27 @@ https://projecteuler.net/problem=20
 """
 
 from math import factorial
+
 from utils import timeit
 
 
 @timeit("Problem 20")
 def compute():
     """
-    n! means n × (n − 1) × ... × 3 × 2 × 1
-    
-    For example, 10! = 10 × 9 × ... × 3 × 2 × 1 = 3628800,
+    n! means n x (n - 1) x ... x 3 x 2 x 1
+
+    For example, 10! = 10 x 9 x ... x 3 x 2 x 1 = 3628800,
     and the sum of the digits in the number 10! is:
     3 + 6 + 2 + 8 + 8 + 0 + 0 = 27.
-    
+
     Find the sum of the digits in the number 100!
     """
+
     fact = factorial(100)
     sum_digits = sum(int(digit) for digit in str(fact))
-    
-    return sum_digits 
+
+    return sum_digits
 
 
 if __name__ == "__main__":
-
-    print(f"Result for Problem 20: {compute()}")
+    print(f"Result for Problem 20 is {compute()}")