message: Combine nested `if` conditions
diff: @@ -80,13 +80,10 @@ protected:
  void think() override
  {
  - if (isIdle())
  - {
  - if (storage() < storageCapacities())
  + if (isIdle() && storage() < storageCapacities())
  {
  enable();
  }
  - }
  if (operational())
  {
  