style(decomposition): fix ruff format violations in decision correction files

Apply ruff format to decomposition_decision_correction_steps.py and
decomposition_service.py to fix CI lint job format check failures.

ISSUES CLOSED: #10012

features/steps/decomposition_decision_correction_steps.py

@@ -71,7 +71,12 @@ def _make_simple_hierarchy() -> DecompositionResult:
         node_id="middle_a",
         parent_id="root",
         depth=1,
-        file_paths=["src/a/file1.py", "src/a/file2.py", "src/a/file3.py", "src/a/file4.py"],
+        file_paths=[
+            "src/a/file1.py",
+            "src/a/file2.py",
+            "src/a/file3.py",
+            "src/a/file4.py",
+        ],
         language=".py",
         directory_prefix="src/a",
         estimated_tokens=200,
@@ -94,8 +99,12 @@ def _make_simple_hierarchy() -> DecompositionResult:
         parent_id=None,
         depth=0,
         file_paths=[
-            "src/a/file1.py", "src/a/file2.py", "src/a/file3.py", "src/a/file4.py",
-            "src/b/file1.py", "src/b/file2.py",
+            "src/a/file1.py",
+            "src/a/file2.py",
+            "src/a/file3.py",
+            "src/a/file4.py",
+            "src/b/file1.py",
+            "src/b/file2.py",
         ],
         language=".py",
         directory_prefix="src",
@@ -229,9 +238,11 @@ def step_then_siblings_preserved(context: Any) -> None:
     """Check that sibling nodes are preserved when a leaf is recomputed."""
     result: DecisionCorrectionResult = context.correction_result
     preserved_ids = result.preserved_node_ids
-    assert "leaf_a2" in preserved_ids or "middle_b" in preserved_ids or "leaf_b1" in preserved_ids, (
-        f"Expected sibling nodes in preserved set, got {preserved_ids}"
-    )
+    assert (
+        "leaf_a2" in preserved_ids
+        or "middle_b" in preserved_ids
+        or "leaf_b1" in preserved_ids
+    ), f"Expected sibling nodes in preserved set, got {preserved_ids}"
 
 
 @then("ancestor nodes should be in the preserved set")
@@ -239,9 +250,11 @@ def step_then_ancestors_preserved(context: Any) -> None:
     """Check that ancestor nodes are preserved."""
     result: DecisionCorrectionResult = context.correction_result
     preserved_ids = result.preserved_node_ids
-    assert "root" in preserved_ids or "middle_a" in preserved_ids or "middle_b" in preserved_ids, (
-        f"Expected ancestor nodes in preserved set, got {preserved_ids}"
-    )
+    assert (
+        "root" in preserved_ids
+        or "middle_a" in preserved_ids
+        or "middle_b" in preserved_ids
+    ), f"Expected ancestor nodes in preserved set, got {preserved_ids}"
 
 
 @then("sibling branches should not be in the recomputed set")
@@ -300,7 +313,9 @@ def step_then_has_preserved_node_ids(context: Any) -> None:
 def step_then_has_metrics(context: Any) -> None:
     """Check that the result has metrics."""
     result: DecisionCorrectionResult = context.correction_result
-    assert isinstance(result.metrics, dict), f"Expected dict, got {type(result.metrics)}"
+    assert isinstance(result.metrics, dict), (
+        f"Expected dict, got {type(result.metrics)}"
+    )
     assert len(result.metrics) > 0, f"Expected non-empty metrics, got {result.metrics}"
 
 

src/cleveragents/application/services/decomposition_service.py

@@ -393,7 +393,6 @@ class DecompositionService:
         """
         return self._closure_computer.compute_closure(graph, root_files, cutoff)
 
-
     def recompute_subtree(
         self,
         node_id: str,