fix lint and formatting violations in tests and source

tests/test_config.py

@@ -1,8 +1,12 @@
 """Tests for configuration module."""
 
 from tuimble.config import (
-    AudioConfig, Config, PttConfig, ServerConfig,
-    _load_section, load_config,
+    AudioConfig,
+    Config,
+    PttConfig,
+    ServerConfig,
+    _load_section,
+    load_config,
 )
 
 
@@ -55,11 +59,14 @@ def test_server_cert_custom():
 
 def test_load_section_filters_unknown_keys():
     """Unknown keys are silently dropped, valid keys are kept."""
-    result = _load_section(ServerConfig, {
-        "host": "example.com",
-        "typo_field": "oops",
-        "another_bad": 42,
-    })
+    result = _load_section(
+        ServerConfig,
+        {
+            "host": "example.com",
+            "typo_field": "oops",
+            "another_bad": 42,
+        },
+    )
     assert result.host == "example.com"
     assert result.port == 64738  # default preserved
 
@@ -86,8 +93,7 @@ def test_load_config_with_unknown_keys(tmp_path):
     """Config file with unknown keys loads without error."""
     toml = tmp_path / "config.toml"
     toml.write_text(
-        '[server]\nhost = "example.com"\nbogus = true\n'
-        '[ptt]\nfuture_option = "x"\n'
+        '[server]\nhost = "example.com"\nbogus = true\n[ptt]\nfuture_option = "x"\n'
     )
     cfg = load_config(toml)
     assert cfg.server.host == "example.com"