Update syntax highlighting, update allUnique

snippets/fibonacci_until_num.md

@@ -7,14 +7,14 @@ Returns the n-th term in a Fibonnaci sequence that starts with 1
 A term in a Fibonnaci sequence is the sum of the two previous terms.
 This function recursively calls the function to find the n-th term.
 
-``` python
+```py
 def fibonacci_until_num(n):
   if n < 3:
     return 1
   return fibonacci_until_num(n - 2) + fibonacci_until_num(n - 1)
 ```
 
-``` python
+```py
 fibonnaci_until_num(5) # 5
 fibonnaci_until_num(15) # 610
 ```