fix(ruff): Made ruff happy.

tests/extra/whatever.yaml

@@ -1,5 +1,5 @@
 whatever:
   the: heck
   should: be
-  here: null
+  here: dude
 

tests/test_extra.py

@@ -1,4 +1,5 @@
-from os import path
+from __future__ import annotations
+
 from pathlib import Path
 
 from yaml_settings_pydantic import (
@@ -10,13 +11,13 @@
 WHATEVER = Path(__file__).parent / "extra" / "whatever.yaml"
 
 
-def test_yaml_files_dict_string_keys():
+def test_yaml_files_dict_string_keys() -> None:
     """For now, make sure that this does not fail."""
 
     class Settings(BaseYamlSettings):
         the: str
         should: str
-        here: str | None
+        here: str
 
         model_config = YamlSettingsConfigDict(
             yaml_files={
@@ -30,4 +31,4 @@ class Settings(BaseYamlSettings):
     settings = Settings.model_validate({})
     assert settings.the == "heck"
     assert settings.should == "be"
-    assert settings.here is None
+    assert settings.here == "dude"

yaml_settings_pydantic/__init__.py

@@ -24,8 +24,7 @@
 from jsonpath_ng import parse
 from pydantic.fields import FieldInfo
 from pydantic.v1.utils import deep_update
-from pydantic_settings import (BaseSettings, PydanticBaseSettingsSource,
-                               SettingsConfigDict)
+from pydantic_settings import BaseSettings, PydanticBaseSettingsSource, SettingsConfigDict
 from typing_extensions import Doc, NotRequired, TypedDict
 from yaml import safe_load