I am proofing an article and the author has written this:
She states: [A]n ekphrasis can be of any length, of any subject matter, composed in verse or prose, using any verbal techniques, as long as it “brings its subject before the eyes” or, as one of the ancient authors says, “makes listeners into spectators.”
I only have experienced square brackets used like this inside of a quotation. Are they really necessary/correct in this case?