- zypper info
  Show 'required argument missing' message.
  Show info command help.

- zypper info foo
  show info for package foo

- zypper info -t type foo
  show info for resolvable foo of the specified type

- zypper info non-existent
  show 'package non-existent not found' message

- zypper info -t type non-existent
  show '"type" non-existent not found' message

TODO add patch-info, and info options
