Part of me can't see why they bother putting it for quoted writing. If I saw a mistake in a quote, I would assume it was the original quote that had a mistake, not the writer of the book. On the other hand, most people probably wouldn't think about this and so authors would end up with tons of letters entitled:
'spelling errors on pages 4, 17, 90, 140 etc... '
even though it was not them who did it!
Still bugs me though...
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I have HFA, ADHD, OCD & Tourette syndrome. I love animals, especially my bunnies and hamster. I skate in a roller derby team (but I'll try not to bite

)