rakyll/command — pull request #3 by JustAdam (2014-03-18 19:54:50+00:00)
Title: Allow required arguments for subcommands

Simple enforcement that additional arguments are passed to a subcommand. If they are not then the subcommand's usage is displayed.

```
command.On("subcommand", "prints the version", &SubCommand{}, []string{"", ""})

$ program version full
```

* BC break in On() function.
* Arguments are fetched in cmd.Run() the same way as today (and there is no reference to the text passed to On() - that is currently used in usage output)
* Addition of more whitespace is usage output