fix(#256): remove the extra indentation added when parsing

Close #2576

Signed-off-by: Frost Ming <me@frostming.com>

tests/test_toml_document.py

@@ -1059,3 +1059,16 @@ def test_build_table_with_dotted_key():
     assert json.loads(json.dumps(doc)) == {
         "a": {"b": {"c": 1, "d": 2}, "d": {"e": 3}, "c": {"foo": "bar"}}
     }
+
+
+def test_parse_subtables_no_extra_indent():
+    expected = """\
+[a]
+    [a.b.c]
+        foo = 1
+
+    [a.b.d]
+        bar = 2
+"""
+    doc = parse(expected)
+    assert doc.as_string() == expected

tomlkit/items.py

@@ -2,6 +2,7 @@
 
 import abc
 import copy
+import dataclasses
 import re
 import string
 
@@ -303,32 +304,23 @@ def __len__(self):
         return len(self.value)
 
 
+@dataclasses.dataclass
 class Trivia:
     """
     Trivia information (aka metadata).
     """
 
-    def __init__(
-        self,
-        indent: str = None,
-        comment_ws: str = None,
-        comment: str = None,
-        trail: str = None,
-    ) -> None:
-        # Whitespace before a value.
-        self.indent = indent or ""
-        # Whitespace after a value, but before a comment.
-        self.comment_ws = comment_ws or ""
-        # Comment, starting with # character, or empty string if no comment.
-        self.comment = comment or ""
-        # Trailing newline.
-        if trail is None:
-            trail = "\n"
-
-        self.trail = trail
+    # Whitespace before a value.
+    indent: str = ""
+    # Whitespace after a value, but before a comment.
+    comment_ws: str = ""
+    # Comment, starting with # character, or empty string if no comment.
+    comment: str = ""
+    # Trailing newline.
+    trail: str = "\n"
 
     def copy(self) -> Trivia:
-        return type(self)(self.indent, self.comment_ws, self.comment, self.trail)
+        return dataclasses.replace(self)
 
 
 class KeyType(Enum):

tomlkit/parser.py

@@ -955,7 +955,7 @@ def _parse_table(
                 # So we have to create the parent tables
                 table = Table(
                     Container(True),
-                    Trivia(indent, cws, comment, trail),
+                    Trivia("", cws, comment, trail),
                     is_aot and name_parts[0] in self._aot_stack,
                     is_super_table=True,
                     name=name_parts[0].key,