The author's point here is different than that, though. The original writer had no need to substitute the pronoun in the short quote. It was replaced with just

The author's point here is different than that, though. The original writer had no need to substitute the pronoun in the short quote. It was replaced with just another pronoun, so no extra information was inserted. It would have been just as clear if left in its original phrasing. From TFA: > Sometimes you have to use brackets anyway. Maybe the speaker or writer was using an acronym or a completely unfamiliar piece of jargon that the reader needs explained. Maybe they were referring to a person by their last name or nickname, when the reader has not yet been introduced to the person’s full name. But these changes should be both necessary and obvious.