Add missing newlines at EOF

Author: PaarthShah

tests/conftest.py

@@ -3,4 +3,4 @@
 
 @pytest.fixture(scope="session")
 def pickle_key():
-    return b"DEFAULT_PICKLE_KEY_1234567890___"
+    return b"DEFAULT_PICKLE_KEY_1234567890___"

tests/pk_encryption_test.py

@@ -79,4 +79,4 @@ def test_message_from_invalid_base64():
             b64encode(b"some_text").decode(),
             b64encode(b"some_mac").decode(),
             "not-valid-base64!@#"  # Invalid base64 for ephemeral key
-        )
+        )