feat: makes the Python Substitute Algorithm refactoring solution more…

… simple (#115)

* feat: makes the refactoring solution more simple

The first ambition was to make the example more pythonic (using for i in `range(len(my_list))` is considered bad practice against `for element in my_list`) and then I just managed to simplify further.

* fix: change name of the returned variable

simple/python/substitute-algorithm_after.py

@@ -1,6 +1,3 @@
 def foundPerson(people):
     candidates = ["Don", "John", "Kent"]
-    for i in range(len(people)):
-        if people[i] in candidates:
-            return people[i]
-    return ""
+    return people if people in candidates else ""