factorial

snippets/difference.md

@@ -4,13 +4,11 @@ Returns the difference between two arrays.
 
 Create a `set` from `b`, then use list comprehension to only keep values not contained in `b`
 
-```python 
-
+```python
 
 def difference(a, b):
     b = set(b)
     return [item for item in a if item not in b]
-
 ```
 ``` python
 difference([1, 2, 3], [1, 2, 4]) # [3]