message: [model/tests] Micro simplification of the incrementer test contract
diff: @@ -47,7 +47,7 @@ fn instantiate() -> impl TestableContract<DeployArgs = u32> {
  env.state.val += by
  })
  .on_msg::<Get>(|env, _| {
  - *env.state.val.get()
  + *env.state.val
  })
  .instantiate()
  }
  