In certain cases if an input key has a weird value (such as 0_degrees) it can cause an exception that prevents the behavior from being built. This is due to incorrect formatting in a warning message. This fixes the warning message formatting
In certain cases if an input key has a weird value (such as 0_degrees) it can cause an exception that prevents the behavior from being built. This is due to incorrect formatting in a warning message. This fixes the warning message formatting

team-vigir/flexbe_behavior_engine,team-vigir/flexbe_behavior_engine