'E:Type 'sudo' is not known on line 85...'

Binary package hint: sudo

I am running the latest of ubuntu software and I was trying to get an update for the system when it came back and told me to report this bug i tried editing the sources list but for some reason it won't let me edit it, then save it.
This is the error i was told to report:
'E:Type 'sudo' is not known on line 85 in source list /etc/apt/sources.list, E:The list of sources could not be read.'

I understand what it means but when I try editing the line and deleting the line it says i need permission to do the but i am the admin, on this computer. so any ideas?