message: Minor refinements
diff: @@ -164,7 +164,7 @@ TEST(observed_world, clone) {
  observed_world.reset();
  auto behavior_ego = cloned_observed_world->get_ego_behavior_model();
  - EXPECT_TRUE(static_cast<bool>(behavior_ego));
  + EXPECT_TRUE(behavior_ego != nullptr);
  }
  TEST(observed_world, predict) {
  