docs(shopping): update subject

subjects/devops/shopping/README.md

@@ -1,10 +1,10 @@
-# shopping
+## shopping
 
-## Instructions
+### Instructions
 
 Create a file `shopping.py` with a function `remember_the_apple(shopping_list)`.
 
-This function input is a list of string, like this:
+This function input is a list of strings, like this:
 
 ```python
 ['tomatoes', 'pastas', 'apple', 'salt']
@@ -14,28 +14,28 @@ If the string `'apple'` is not in the list, it should be added. The function ret
 
 If the input list is empty, the returned list should be also empty (don't add the apple in that case).
 
-## Usage
+### Usage
 
-Here is a possible `test.py` to test your functions:
+Here is a possible `test.py` to test your function:
 
 ```python
 import shopping
 
-if __name__ == '__main__':
-    list_with_apple = ['tomatoes', 'pastas', 'apple', 'salt']
-    list_without_apple = ['tomatoes', 'pastas', 'salt']
+list_with_apple = ['tomatoes', 'pastas', 'apple', 'salt']
+list_without_apple = ['tomatoes', 'pastas', 'salt']
 
-    print(shopping.remember_the_apple(list_with_apple))
-    print(shopping.remember_the_apple(list_without_apple))
+print(shopping.remember_the_apple(list_with_apple))
+print(shopping.remember_the_apple(list_without_apple))
 ```
 
 ```bash
 $ python test.py
 ['tomatoes', 'pastas', 'apple', 'salt']
 ['tomatoes', 'pastas', 'salt', 'apple']
+$
 ```
 
-## Notions
+### Notions
 
-- [lists](https://docs.python.org/3/tutorial/datastructures.html#)
+- [Lists](https://docs.python.org/3/tutorial/datastructures.html#)
 - [Conditions](https://docs.python.org/3/tutorial/datastructures.html#more-on-conditions)