fixed _show_description that was broken in refactoring of method names
fixed _show_description that was broken in refactoring of method names

walterbender/turtleconfusion,walterbender/turtle3D,walterbender/turtleartmini,walterbender/turtleart,walterbender/AmazonasTortuga,walterbender/turtleflags,AlanJAS/turtleart