giving a description for arguments

[noraj]

[DSL#arg] lacks a :desc option to describe the argument in order to specify what is expected.

For example, in other tools you often see description for arguments:

The temporary workaround I found was to describe them in the long_desc:

        duzdu.desc 'TODO'
        duzdu.long_desc "<name>: DNS name, A record. The domain is automatically appended, e.g. test ➡️ test.example.org\n\n<ip>: IP address."
        duzdu.arg :'<name>'
        duzdu.arg :'<ip>'
        duzdu.command :add do |add|
          add.action do |_global_options, options, _args|
            duz = duzdu_init(options)
            duz.display('addv4')
          end
        end

hacking the arguments' description into the command long description:

[davetron5000]

Yeah, this seems useful. Could be complicated to document and format but there's no philosophical reason why this isn't there.