squash: fix tests

Author: happz

tests/unit/test_filesystem.py

@@ -254,8 +254,12 @@ def test_fallback(
 
     tmt.utils.filesystem.copy_tree(src=source_dir, dst=dest_dir, logger=root_logger)
 
-    cast(MagicMock, mock_copy_tree_cp).assert_called_once_with(src=source_dir, dst=dest_dir, tmpdir_creator=None, logger=mock.ANY)
-    cast(MagicMock, mock_copy_tree_shutil).assert_called_once_with(src=source_dir, dst=dest_dir, tmpdir_creator=None, logger=mock.ANY)
+    cast(MagicMock, mock_copy_tree_cp).assert_called_once_with(
+        src=source_dir, dst=dest_dir, tmpdir_creator=None, logger=mock.ANY
+    )
+    cast(MagicMock, mock_copy_tree_shutil).assert_called_once_with(
+        src=source_dir, dst=dest_dir, tmpdir_creator=None, logger=mock.ANY
+    )
 
     # Verify files were copied using the fallback approach (shutil.copytree)
     for file_path in _EXPECTED_TEST_FILES: