Update test/basekernels/matern.jl

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

Author: devmotion

test/basekernels/matern.jl

@@ -21,7 +21,10 @@
         # Test custom `rrule` (Zygote workaround).
         k = MaternKernel(; ν=rand())
         test_rrule(
-            KernelFunctions._get_ν, k ⊢ ChainRulesTestUtils.Tangent{typeof(k)}(; ν=randn(), metric=ChainRulesTestUtils.NoTangent())
+            KernelFunctions._get_ν,
+            k ⊢ ChainRulesTestUtils.Tangent{typeof(k)}(;
+                ν=randn(), metric=ChainRulesTestUtils.NoTangent()
+            ),
         )
 
         # Standardised tests.