Some improvements to the gym documentation chapter
Some improvements to the gym documentation chapter

rolandgeider/wger,rolandgeider/wger,rolandgeider/wger,petervanderdoes/wger,petervanderdoes/wger,petervanderdoes/wger,wger-project/wger,petervanderdoes/wger,wger-project/wger,wger-project/wger,wger-project/wger,rolandgeider/wger