Yours was the last wish to corrupt ... From this point forward, wishes will only corrupt ???, !!!, and other forms of punctuation that are not ...
Of course, this only applies to those languages that use these forms of punctuation and if, for instance, you were to be reading this translated into a language to which "english punctuation" does not apply, your wish would not be corrupted at all, simply ignored.
Soooo.... I wish for RotS to make a wish that can be easily adapted into other languages for the purposes of corruption. And I'd like fries with that.