Update some snippets

snippets/compact.md

@@ -1,14 +1,15 @@
 ---
 title: compact
-tags: list
+tags: list,beginner
 ---
+
 Removes falsey values from a list.
 
-Use `filter()` to filter out falsey values (False, None, 0, and "").
+Use `filter()` to filter out falsey values (`False`, `None`, `0`, and `""`).
 
 ```py
 def compact(lst):
-    return list(filter(bool, lst))
+  return list(filter(bool, lst))
 ```
 
 ```py