properly use sphinx's logger

sphinx/ext/napoleon/docstring.py

@@ -13,15 +13,15 @@
 import inspect
 import re
 from functools import partial
-import logging
 from typing import Any, Callable, Dict, List, Tuple, Union
 
 from sphinx.application import Sphinx
 from sphinx.config import Config as SphinxConfig
 from sphinx.ext.napoleon.iterators import modify_iter
 from sphinx.locale import _, __
+from sphinx.util import logging
 
-logger = logging.Logger(__name__)
+logger = logging.getLogger(__name__)
 
 if False:
     # For type annotation
@@ -792,7 +792,12 @@ def _recombine_set_tokens(tokens):
                 token = next(iterable)
             except StopIteration:
                 if open_braces != 0:
-                    logger.warning(__("invalid value set: %r"), "".join(tokens))
+                    location = ("", "")
+                    logger.warning(
+                        __("invalid value set: %r"),
+                        "".join(tokens),
+                        location=location,
+                    )
 
                 break