Currently, if the answer to a fill-in-the-blank question is "I can't swim" and the student enters "I can’t swim", the answer is marked incorrect because the student used a curly apostrophe instead of a straight one. This can happen if the student wrote their answer in MS Word or Google Docs and pasted it into Canvas. It doesn't make sense to mark this answer wrong.
This happens in both old and new quizzes. Quizzes.Next has a nice workaround with the "Close Enough" text match option, but it still doesn't make sense for a curly quote or apostrophe to count against the Levenshtein Distance. I'm sure you could also use a regular expression to account for all three possible quote characters, but that's too tedious for what should be an intuitive thing.
Different quote styles (curly vs. straight) should be counted equal for fill-in-the-blank questions.