diff --git a/src/solvers/dgmulti/dg.jl b/src/solvers/dgmulti/dg.jl
index dfd83844770..45d18927e18 100644
--- a/src/solvers/dgmulti/dg.jl
+++ b/src/solvers/dgmulti/dg.jl
@@ -7,7 +7,9 @@
 
 # out <- A*x
 mul_by!(A) = @inline (out, x) -> matmul!(out, A, x)
-mul_by!(A::T) where {T <: Union{<:Kronecker.KroneckerProduct, SimpleKronecker}} = @inline (out, x) -> mul!(out, A, x)
+mul_by!(A::T) where {T <: Union{<:Kronecker.KroneckerProduct, SimpleKronecker}} = @inline (out, x) -> mul!(out,
+                                                                                                           A,
+                                                                                                           x)
 mul_by!(A::AbstractSparseMatrix) = @inline (out, x) -> mul!(out, A, x)
 function mul_by!(A::LinearAlgebra.AdjOrTrans{T, S}) where {T, S <: AbstractSparseMatrix}
     @inline (out, x) -> mul!(out, A, x)