Mark Twain is one of favorite authors. This is a shame. This just means I need to go out and purchase old editions of MT. There is only a finite amount of MT writings after all... And also to never EVER purchase anything by NewSouth.
On a broader sense, without having an older edition of a text immediately next to a newer edition, if reading for the first time, how does one know if it is censored? This is something that worries me, especially given the shift of book retailers to fill their shelves with mostly mindless bubble-gum entertainment books as well as a shift to e-readers.
Here is my approach. If you are so egregiously offended by the use of a particular word, DON'T READ THAT BOOK!