Have black people actually been asked whether they'd prefer the word to be changed in texts from a previous era? Presumably it's a misguided attempt to spare their feelings that this is felt to be necessary. If they would rather it stayed as written by Mark Twain, why should anyone take it upon themselves to Bowdlerise the books? It was the same here with Enid Blyton's children's books. All Golliwogs were eradicated from her stories, even though they're only toys. Many black people said they'd rather keep the Gollies, but the Politically Correct Brigade hung in there. I think young students are perfectly capable of taking the texts as written, and indeed it's an insult to them to try to screen them from any racism. One should NOT change any text from the past, it's vandalism of literature.