Update syntax highlighting, update allUnique

snippets/has_duplicates.md

@@ -6,12 +6,12 @@ Checks a flat list for duplicate values. Returns True if duplicate values exist
 
 This function compares the length of the list with length of the set() of the list. set() removes duplicate values from the list.
 
-``` python
+```py
 def has_duplicates(lst):
     return len(lst) != len(set(lst))
 ```
 
-``` python
+```py
 x = [1,2,3,4,5,5]
 y = [1,2,3,4,5]
 has_duplicates(x) # True