fix more ambiguities

Author: dkarrasch

stdlib/LinearAlgebra/src/triangular.jl

@@ -2182,6 +2182,9 @@ factorize(A::AbstractTriangular) = A
 # disambiguation methods: /(Adjoint of AbsVec, <:AbstractTriangular)
 /(u::AdjointAbsVec, A::Union{LowerTriangular,UpperTriangular}) = adjoint(adjoint(A) \ u.parent)
 /(u::AdjointAbsVec, A::Union{UnitLowerTriangular,UnitUpperTriangular}) = adjoint(adjoint(A) \ u.parent)
+# disambiguation methods: /(Transpose of AbsVec, <:AbstractTriangular)
+/(u::TransposeAbsVec, A::Union{LowerTriangular,UpperTriangular}) = transpose(transpose(A) \ u.parent)
+/(u::TransposeAbsVec, A::Union{UnitLowerTriangular,UnitUpperTriangular}) = transpose(transpose(A) \ u.parent)
 # disambiguation methods: /(Transpose of AbsVec, Adj/Trans of <:AbstractTriangular)
 for (tritype, comptritype) in ((:LowerTriangular, :UpperTriangular),
                                (:UnitLowerTriangular, :UnitUpperTriangular),