message: make longest composition test longer
diff: @@ -63,6 +63,7 @@ protected:
  gko::initialize<Mtx>(
  {I<T>({9.0, 4.0}), I<T>({6.0, -2.0}), I<T>({-3.0, 2.0})},
  exec),
  + gko::initialize<Mtx>({I<T>({1.0, 0.0}), I<T>({0.0, 1.0})}, exec),
  gko::initialize<Mtx>({I<T>({1.0, 0.0}), I<T>({0.0, 1.0})}, exec)},
  identity{
  gko::initialize<Mtx>({I<T>({1.0, 0.0}), I<T>({0.0, 1.0})}, exec)},
  @@ -195,7 +196,7 @@ TYPED_TEST(Composition, AppliesLongerLinearCombinationToVector)
  TYPED_TEST(Composition, AppliesLongestToVector)
  {
  /*
  - cmp = [ 2 ] * [ 3 2 ] * [ -1 1 2 ] * [ 9 4 ] * [ 1 0 ]
  + cmp = [ 2 ] * [ 3 2 ] * [ -1 1 2 ] * [ 9 4 ] * [ 1 0 ]^2
  [ 1 ] [ 5 -3 0 ] [ 6 -2 ] [ 0 1 ]
  [ -3 2 ]
  */
  @@ -214,7 +215,7 @@ TYPED_TEST(Composition, AppliesLongestToVector)
  TYPED_TEST(Composition, AppliesLongestLinearCombinationToVector)
  {
  /*
  - cmp = [ 2 ] * [ 3 2 ] * [ -1 1 2 ] * [ 9 4 ] * [ 1 0 ]
  + cmp = [ 2 ] * [ 3 2 ] * [ -1 1 2 ] * [ 9 4 ] * [ 1 0 ]^2
  [ 1 ] [ 5 -3 0 ] [ 6 -2 ] [ 0 1 ]
  [ -3 2 ]
  */
  @@ -235,7 +236,7 @@ TYPED_TEST(Composition, AppliesLongestLinearCombinationToVector)
  TYPED_TEST(Composition, AppliesLongestToVectorMultipleRhs)
  {
  /*
  - cmp = [ 2 ] * [ 3 2 ] * [ -1 1 2 ] * [ 9 4 ] * [ 1 0 ]
  + cmp = [ 2 ] * [ 3 2 ] * [ -1 1 2 ] * [ 9 4 ] * [ 1 0 ]^2
  [ 1 ] [ 5 -3 0 ] [ 6 -2 ] [ 0 1 ]
  [ -3 2 ]
  */
  @@ -255,7 +256,7 @@ TYPED_TEST(Composition, AppliesLongestToVectorMultipleRhs)
  TYPED_TEST(Composition, AppliesLongestLinearCombinationToVectorMultipleRhs)
  {
  /*
  - cmp = [ 2 ] * [ 3 2 ] * [ -1 1 2 ] * [ 9 4 ] * [ 1 0 ]
  + cmp = [ 2 ] * [ 3 2 ] * [ -1 1 2 ] * [ 9 4 ] * [ 1 0 ]^2
  [ 1 ] [ 5 -3 0 ] [ 6 -2 ] [ 0 1 ]
  [ -3 2 ]
  */
  