fix: update to tomlkit 0.13.2 (nested TOML output changed)

pyproject.toml

@@ -18,7 +18,7 @@ classifiers = [
 ]
 dependencies = [
   "sqlalchemy >= 2.0",
-  "tomlkit >= 0.12",
+  "tomlkit >= 0.13.2",
   "typing_extensions"
 ]
 

tests/test_serializable.py

@@ -720,10 +720,28 @@ class DCOuter0(TOMLDataclass):
         assert obj.to_toml_string() == '[inner.key]\n'
         obj = DCOuter0({'key1': DCInner0(), 'key2': DCInner0()})
         self._test_serialize_round_trip(obj, tmp_path)
-        assert obj.to_toml_string() == '[inner]\n\n[inner.key1]\n\n[inner.key2]\n'
+        assert obj.to_toml_string() == '\n[inner.key1]\n\n[inner.key2]\n'
+        @dataclass
+        class DCOuter01(TOMLDataclass):
+            inner: Annotated[Dict[str, DCInner0], Doc('An inner field')]
+        obj = DCOuter01({'key': DCInner0()})
+        self._test_serialize_round_trip(obj, tmp_path)
+        assert obj.to_toml_string() == '\n# An inner field\n[inner.key]\n'
+        obj = DCOuter01({'key1': DCInner0(), 'key2': DCInner0()})
+        self._test_serialize_round_trip(obj, tmp_path)
+        assert obj.to_toml_string() == '\n# An inner field\n\n[inner.key1]\n\n[inner.key2]\n'
         @dataclass
         class DCInner1(TOMLDataclass):
-            x: int
+            x: int = 5
+        @dataclass
+        class DCOuter1(TOMLDataclass):
+            inner: Dict[str, DCInner1]
+        obj = DCOuter1({'key': DCInner1()})
+        self._test_serialize_round_trip(obj, tmp_path)
+        assert obj.to_toml_string() == '[inner.key]\nx = 5\n'
+        obj = DCOuter1({'key1': DCInner1(1), 'key2': DCInner1(2)})
+        self._test_serialize_round_trip(obj, tmp_path)
+        assert obj.to_toml_string() == '\n[inner.key1]\nx = 1\n\n[inner.key2]\nx = 2\n'
 
     def test_field_doc(self, tmp_path):
         """Tests field-level documentation in TOML serialization."""