style(simd): Phase 4 — rustfmt fix on simd_scalar.rs

`use core::ops::{...}` import list was wrapped at a slightly different
column than rustfmt prefers (post-extraction reflow). One-line fmt diff.

Author: claude

src/simd_scalar.rs

@@ -18,8 +18,8 @@
 
 use core::fmt;
 use core::ops::{
-    Add, AddAssign, BitAnd, BitAndAssign, BitOr, BitOrAssign, BitXor, BitXorAssign, Div, DivAssign, Mul, MulAssign, Neg,
-    Not, Shl, Shr, Sub, SubAssign,
+    Add, AddAssign, BitAnd, BitAndAssign, BitOr, BitOrAssign, BitXor, BitXorAssign, Div, DivAssign, Mul, MulAssign,
+    Neg, Not, Shl, Shr, Sub, SubAssign,
 };
 
 // ── Macros for scalar fallback boilerplate ────────────────────────