message: Fix a test that wasn't testing the right thing
diff: @@ -465,7 +465,8 @@ TEST_F(GpuFusibleTest,
  const HloInstruction* fusion_1 =
  module->entry_computation()->root_instruction()->operand(0)->operand(0);
  const HloInstruction* fusion_2 =
  - module->entry_computation()->root_instruction()->operand(1)->operand(0);
  + module->entry_computation()->root_instruction()->operand(2);
  + EXPECT_NE(fusion_1, fusion_2);
  EXPECT_TRUE(ShapesCompatibleForMultiOutputFusion(*fusion_1, *fusion_2));
  }
  