Adopted new convention from template

src/Python/Problems001-050/Problem028.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python3
+#!/usr/bin/env python
 """
 Created on 3 Jan 2020
 
@@ -29,20 +29,20 @@ def compute():
     What is the sum of the numbers on the diagonals in a 1001 by 1001 spiral
     formed in the same way?
     """
+
     size = 1001  # Must be odd
-    ans = 1   # Special case for size 1
+    ans = 1  # Special case for size 1
     step = 0
-    i, cur = 1, 1
-    while step < size-1:
+    i, current = 1, 1
+    while step < size - 1:
         step = i * 2
-        for j in range(1, 5):
-            cur += step
-            ans += cur
+        for _ in range(1, 5):
+            current += step
+            ans += current
         i += 1
 
     return ans
 
 
 if __name__ == "__main__":
-
-    print(f"Result for Problem 28: {compute()}")
+    print(f"Result for Problem 28 is {compute()}")