[Aptitude-devel] Bug#1023559: Bug#1023559: show with no arguments

[Dan Jacobson]

To be picky, one also notices the man page says <packages>,
which means they are required:

       aptitude [<options>...] {build-dep | build-depends | changelog |
                download | forbid-version | hold | install | markauto | purge
                | reinstall | remove | show | showsrc | source | unhold |
                unmarkauto | versions} <packages>...

But for e.g., install, purge, that isn't actually the case.