Added newline

pre_commit_hooks/check_yaml.py

diff --git a/pre_commit_hooks/check_yaml.py b/pre_commit_hooks/check_yaml.py
index 9bbd36c..9b0ac89 100644
--- a/pre_commit_hooks/check_yaml.py
+++ b/pre_commit_hooks/check_yaml.py
@@ -4,6 +4,7 @@
 import collections
 import sys
 import io
+
 from typing import Any
 from typing import Generator
 from typing import Optional