Update syntax highlighting, update allUnique

snippets/all_unique.md

@@ -1,17 +1,18 @@
 ---
 title: all_unique
-tags: list
+tags: list,beginner
 ---
-Checks a flat list for all unique values. Returns True if list values are all unique and False if list values aren't all unique.
 
-This function compares the length of the list with length of the set() of the list. set() removes duplicate values from the list.
+Returns `True` if all the values in a flat list are unique, `False` otherwise.
 
-``` python
+Use `set()` on the given list to remove duplicates, compare its length with the length of the list.
+
+```py
 def all_unique(lst):
     return len(lst) == len(set(lst))
 ```
 
-``` python
+```py
 x = [1,2,3,4,5,6]
 y = [1,2,2,3,4,5]
 all_unique(x) # True