Salutations,
This is not as much a bug report but more a feature suggestion.
In the users command I propose that the users has an option (since I don't see one in --help)
that allows to see users without repetition and all users.
For example I have two users A and B.
When in A session since (I assume) A is in several groups it appears:
A A A A
I suggest a command line option to either show the group or the output A.
Also A and B should be an idea for some root option maybe!?
Note that these options might already exist if so I propose a more informative --help.
Using linux mint 17.2 here.
Best regards