docs(04): format markdown

sohnryang · sohnryang · commit 0c740a4929e9 · 2023-06-18T16:53:25.000+09:00
diff --git a/04-functions-modules/guide.md b/04-functions-modules/guide.md
@@ -17,6 +17,7 @@ Implement `min`, `max` functions on your own.
 Implement a function which swaps indices of list.
 
 ## Hanoi
+
 - difficulty: ★☆☆
 - time: ~ 30m for beginners
 - background: recursion
