Apply pre-commit formatting (yapf) [skip-build]

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

torch-ext/optimizer/newton_schulz.py

@@ -40,9 +40,8 @@ def _optimal_quintic(l, u, max_iter=1000):
         ])
         a, b, c, E = np.linalg.solve(LHS, np.ones(4))
         if not np.all(np.isfinite([a, b, c, E])):
-            raise ValueError(
-                f"_optimal_quintic: non-finite solve result "
-                f"a={a}, b={b}, c={c}, E={E}")
+            raise ValueError(f"_optimal_quintic: non-finite solve result "
+                             f"a={a}, b={b}, c={c}, E={E}")
         q, r = np.sqrt(
             (-3 * b + np.array([-1, 1]) * sqrt(9 * b**2 - 20 * a * c)) /
             (10 * c))