code simplification w/o functional changes

Author: dkarrasch

src/solvers/umfpack.jl

@@ -955,15 +955,15 @@ import LinearAlgebra.ldiv!
 ldiv!(lu::UmfpackLU{T}, B::StridedVecOrMat{T}) where {T<:UMFVTypes} =
     ldiv!(B, lu, copy(B))
 ldiv!(translu::TransType{T,<:UmfpackLU{T}}, B::StridedVecOrMat{T}) where {T<:UMFVTypes} =
-    (lu = translu.parent; ldiv!(B, transpose(lu), copy(B)))
+    ldiv!(B, translu, copy(B))
 ldiv!(adjlu::AdjType{T,<:UmfpackLU{T}}, B::StridedVecOrMat{T}) where {T<:UMFVTypes} =
-    (lu = adjlu.parent; ldiv!(B, adjoint(lu), copy(B)))
+    ldiv!(B, adjlu, copy(B))
 ldiv!(lu::UmfpackLU{Float64}, B::StridedVecOrMat{<:Complex}) =
     ldiv!(B, lu, copy(B))
 ldiv!(translu::TransType{Float64,<:UmfpackLU{Float64}}, B::StridedVecOrMat{<:Complex}) =
-    (lu = translu.parent; ldiv!(B, transpose(lu), copy(B)))
+    ldiv!(B, translu, copy(B))
 ldiv!(adjlu::AdjType{Float64,<:UmfpackLU{Float64}}, B::StridedVecOrMat{<:Complex}) =
-    (lu = adjlu.parent; ldiv!(B, adjoint(lu), copy(B)))
+    ldiv!(B, adjlu, copy(B))
 
 ldiv!(X::StridedVecOrMat{T}, lu::UmfpackLU{T}, B::StridedVecOrMat{T}) where {T<:UMFVTypes} =
     _Aq_ldiv_B!(X, lu, B, UMFPACK_A)