Refactor code formatting for better readability

Reformatted function calls and comments across `tests/test_tenacity.py` and `tenacity/config.py` for consistent indentation and alignment. This improves the code's readability and maintainability.

tenacity/config.py

@@ -34,8 +34,9 @@ class DictConfig:
     - __contains__: Checks if a configuration attribute exists.
     - __repr__: Returns a string representation of the configuration object.
     """
+
     _instance = None
-    _lock = Lock()      # For thread safety
+    _lock = Lock()  # For thread safety
 
     def __new__(cls):
         if cls._instance is None:
@@ -60,9 +61,11 @@ def delete_attribute(self, name: str) -> None:
         if name in self._config:
             del self._config[name]
         else:
-            raise KeyError(f'Attribute {name} not found in configuration.')
+            raise KeyError(f"Attribute {name} not found in configuration.")
 
-    def get_config(self, override: t.Optional[t.Dict[str, t.Any]] = None) -> t.Dict[str, t.Any]:
+    def get_config(
+        self, override: t.Optional[t.Dict[str, t.Any]] = None
+    ) -> t.Dict[str, t.Any]:
         """
         Retrieves the configuration dictionary.
 
@@ -93,7 +96,7 @@ def __contains__(self, name: str) -> bool:
         return name in self._config
 
     def __repr__(self) -> str:
-        return f'<DictConfig {self._config}>'
+        return f"<DictConfig {self._config}>"
 
 
 dict_config = DictConfig()

tests/test_tenacity.py

@@ -1800,16 +1800,22 @@ def setUp(self):
 
     def test_set_and_get_config(self):
         # Set new configuration attributes
-        dict_config.set_config(stop=tenacity.stop_after_attempt(3), wait=tenacity.wait_fixed(1))
+        dict_config.set_config(
+            stop=tenacity.stop_after_attempt(3), wait=tenacity.wait_fixed(1)
+        )
         self.assertIsInstance(dict_config.get("stop"), tenacity.stop_after_attempt)
         self.assertIsInstance(dict_config.get("wait"), tenacity.wait_fixed)
 
     def test_override_config(self):
         # Set initial configuration
-        dict_config.set_config(stop=tenacity.stop_after_attempt(3), wait=tenacity.wait_fixed(1))
+        dict_config.set_config(
+            stop=tenacity.stop_after_attempt(3), wait=tenacity.wait_fixed(1)
+        )
 
         # Override specific attribute
-        custom_config = dict_config.get_config(override={"wait": tenacity.wait_fixed(2)})
+        custom_config = dict_config.get_config(
+            override={"wait": tenacity.wait_fixed(2)}
+        )
         self.assertIsInstance(custom_config["wait"], tenacity.wait_fixed)
         self.assertIsInstance(custom_config["stop"], tenacity.stop_after_attempt)
 
@@ -1824,17 +1830,22 @@ def test_delete_config(self):
 
     def test_retry_with_default_config(self):
         # Set default configuration
-        dict_config.set_config(stop=tenacity.stop_after_attempt(2), wait=tenacity.wait_fixed(0.1))
+        dict_config.set_config(
+            stop=tenacity.stop_after_attempt(2), wait=tenacity.wait_fixed(0.1)
+        )
 
         @retry
         def failing_func():
             raise ValueError("This should trigger retries")
+
         with self.assertRaises(tenacity.RetryError):
-            failing_func()      # Should raise a RetryError
+            failing_func()  # Should raise a RetryError
 
     def test_retry_with_override(self):
         # Set default configuration
-        dict_config.set_config(stop=tenacity.stop_after_attempt(2), wait=tenacity.wait_fixed(0.1))
+        dict_config.set_config(
+            stop=tenacity.stop_after_attempt(2), wait=tenacity.wait_fixed(0.1)
+        )
 
         @retry(reraise=True)
         def failing_func():