Fix flake8 errors

yamllint/cli.py

@@ -32,6 +32,7 @@ def find_files_recursively(items, exclude_patterns):
         os.path.normpath(os.path.expanduser(pattern))
         for pattern in exclude_patterns or ()
     }
+
     def is_excluded(path, exclude_patterns):
         """Return True if any pattern in exclude_patterns matches path."""
         path = os.path.normpath(path)