style: Fix ruff formatting in test_metric_writer

Co-Authored-By: Rahul Kaushal <rahulkaushal04@users.noreply.github.com>
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: 3 people

tests/test_metric_writer.py

@@ -50,9 +50,7 @@ class CounterMetric(Metric):
     fpath = tmp_path / "test.txt"
 
     with MetricWriter(CounterMetric, fpath) as writer:
-        writer.write(
-            CounterMetric(name="test", counts=Counter({FakeEnum.FOO: 3, FakeEnum.BAR: 4}))
-        )
+        writer.write(CounterMetric(name="test", counts=Counter({FakeEnum.FOO: 3, FakeEnum.BAR: 4})))
 
     with fpath.open("r") as f:
         assert next(f) == "name\tfoo\tbar\n"