As I said, it's an EPub with garbage. It's not passing the validation. I need to replace the string with a quote, which is what it is supposed to be. The browser is displaying it correctly, but I want it to display a double-quote instead.

Epubs have their own rules. I am working on an exploded Epub where the original file got corrupted, and I don't want to fix all the files in an editor - they are almost a gig.