replaced option_map_SomeD by option_map_eq_Some (RS iffD1)
added option_map_eq_Some to simpset(), option_map_eq_Some RS iffD1 to claset()
2
isabelle14.bdf -isabelle-fixed-medium-r-normal--14-140-75-75-m-90-isabelle-0
isabelle24.bdf -isabelle-fixed-bold-r-normal--24-240-75-75-m-150-isabelle-0