Fix the failing tests in System.Console.Hawk.Args.Parse

[gelisam]

No description provided.

[gelisam]

Woah, this one is pretty weird. The failing doctest is in System.Console.Hawk.Args.Parse, but that test does not fail when I run doctest on System.Console.Hawk.Args.Parse, it only fails when I run doctest on System.Console.Hawk, which happens to cause doctest to also run the System.Console.Hawk.Args.Parse tests because System.Console.Hawk imports System.Console.Hawk.Args, which imports System.Console.Hawk.Args.Parse.

Since doctest is implemented by pasting all the tests into ghci one after the other, it's possible for one test to modify ghci's environment in a way which will cause later tests to fail. But I would only expect this if e.g. language extensions are enabled or something, I would not expect a pure function to suddenly return a different result!