getOpt return record of type a rather than [a]

[Henning Thielemann]

On Tue, 18 Dec 2007, Stefan O'Rear wrote:

> The approach you describe is quite possible with the current GetOpt,
> just apply (foldr ($) initialValue) to the return value, and allow a to
> be instantiated with a function type.

Great idea! One should add this as example to the docs of GetOpt, because
the example given there works the way I didn't like.