fix arc svg export
fix arc svg export

tradzik/turtleblocksjs,rodibot/turtleblocksjs,i5o/turtleblocksjs,tchx84/turtleblocksjs,Daksh/turtleblocksjs,walterbender/turtleblocksjs,walterbender/turtleblocksjs,tradzik/turtleblocksjs,tradzik/turtleblocksjs,hemantkasat/turtleblocksjs,garyservin/turtleblocksjs,tchx84/turtleblocksjs,i5o/turtleblocksjs,Daksh/turtleblocksjs,walterbender/turtleblocksjs,rodibot/turtleblocksjs,tchx84/turtleblocksjs,garyservin/turtleblocksjs,hemantkasat/turtleblocksjs,garyservin/turtleblocksjs,Daksh/turtleblocksjs,i5o/turtleblocksjs,hemantkasat/turtleblocksjs,rodibot/turtleblocksjs