Fix test case, remove unnecessary recursion on dataclass (we aren't testing that in the particular unit test)

Author: StefanTodoran

Lib/pprint.py

@@ -234,8 +234,6 @@ def _pprint_dataclass(self, object, stream, indent, allowance, context, level):
         items = [(f.name, getattr(object, f.name)) for f in dataclass_fields(object) if f.repr]
         stream.write(self._format_block_start(cls_name + '(', indent))
         self._format_namespace_items(items, stream, indent, allowance, context, level)
-        if self._block_style:
-            stream.write('\n')
         stream.write(self._format_block_end(')', indent - self._indent_per_level))
 
     _dispatch = {}

Lib/test/test_pprint.py

@@ -1142,7 +1142,6 @@ class DummyDataclass:
             quux: list = field(default_factory=list)
             corge: int = 1
             garply: tuple = (1, 2, 3, 4)
-            waldo: "DummyDataclass" | None = None
         dummy_dataclass = DummyDataclass(
             foo="foo",
             bar=1.2,
@@ -1151,7 +1150,6 @@ class DummyDataclass:
             quux=["foo", "bar", "baz"],
             corge=7,
             garply=(1, 2, 3, 4),
-            waldo=None,
         )
 
         dummy_dict = {
@@ -1299,9 +1297,7 @@ def __init__(self, *args, **kwargs):
         qux={'foo': 'bar', 'baz': 123},
         quux=['foo', 'bar', 'baz'],
         corge=7,
-        garply=(1, 2, 3, 4),
-        waldo=None
-
+        garply=(1, 2, 3, 4)
     ),
     'dummy_dict': {
         'foo': 'bar',