I'm writing (and peer reviewing) rhetorical analyses written in MLA style and have come across punctuation in quotations not matching the MLA style guidelines, as the original author was writing in a different style.
An example is the em dash: in section 2.28 of the MLA Handbook, it's specified that "no space comes before or after the dash." However, the punctuation in the original, cited text does have spaces on either side. When I cite such text in my MLA-styled essay, am I expected to keep the original punctuation or change it to consistently match the style of the rest of the essay, as doing so wouldn't change the meaning of the quote?
I searched the MLA Handbook as much as I've had time (and patience) to, as well as made Google searches in various different wordings, but I haven't found anything at all related to my question.