[R6RS] (delete-file <doesn't-exist>), (delete-file <can't-delete>)

[R. Kent Dybvig]

> What should the behavior of `delete-file' be on files that:
>
> - don't exist
> - can't be deleted
>
> Implementations seem to differ on this point.  Depending on the
> answer, this may or may not raise the question of what the return
> value should be.  (Chez, for example, appears to return a boolean
> indicating whether the deletion was sucessful.)
>
> (My personal preference would be to raise an exception with condition
> type &file-system in both cases.)

That is my preference as well.

Kent