--- a/src/fe_model/p2_local_model.rs	Thu Sep 03 10:59:13 2026 -0500
+++ b/src/fe_model/p2_local_model.rs	Thu Sep 03 11:55:09 2026 -0500
@@ -114,7 +114,11 @@
     #[inline]
     fn p2powers_diff(&self) -> Self::Diff {
         let &Loc([x0, x1]) = self;
-        [[x0 + x0, x1, 0.0].into(), [0.0, x0, x1 + x1].into()].into()
+        [
+            [x0 + x0, x1 + x1, 0.0].into(),
+            [0.0, x0 + x0, x1 + x1].into(),
+        ]
+        .into()
     }
 }