chore: lint source code using Ruff

tests/unit/utils/test_non_empty_str.py

@@ -12,9 +12,10 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from src.jcloud_docsgen.utils import non_empty_str
 import pytest
 
+from src.jcloud_docsgen.utils import non_empty_str
+
 
 @pytest.mark.parametrize(
     'value,expected',