#3 list_files accepted answer is wrong

There's a mistake in the 3rd challenge

List names of all the files in the current directory, one file per line.

the accepted answer is just ls but that is incorrect because ls does not print "one file per line", it prints them in columns side by side. ls -l should be the accepted answer because it's the only true way to get them "one file per line".

So you either change the wording or change the accepted answer

here's an example of what I mean but plain ls not showing "one per line"