fix: add new line at the end of a file

Author: mpolomdeepsense

_test_unstructured_client/integration/test_integration.py

@@ -422,4 +422,4 @@ def test_returns_422_for_invalid_pdf(
         client.general.partition(request=req)
 
     assert "File does not appear to be a valid PDF" in caplog.text
-    assert "422" in caplog.text
+    assert "422" in caplog.text