Rather than manually editing /etc/group, we recommend using pw for that operation. But if the man page does not have an example how to add a user to the (popular) wheel group (or any other), it's hard to teach people proper behavior. With this example in the man page, we can just point people at it.
I was not sure whether I should put the example in the middle of the current ones that are there, reusing the gsmith name. If I put it at the end, people might argue that the example above it just deleted the user and so my example would not actually work since the user must exist. Any comments on that?
Checked with igor and mandoc -Tlint