Description of problem: I looked in the dnf man page for groupinstall, and found that it is not present even though it works. Is this just a documentation issue? If this is the case, I would like to contribute to fixing it. From what I can tell, I would need to look at the spec file and command_ref.rst file.
It is correct. The command groupinstall was replaced with dnf group install. We want user to use the new sintax even if old command is still working.