I read this in Word by Word by Kory Stamper:
Teachers will write in and angrily ask how they can possibly teach their students proper grammar and punctuation if the dictionary can be bothered to use it? Even that is changing, however there is room online to put in both the subject and terminal punctuation, thereby (we hope) saving students of English from utter inevitable idiocy.
I want to ask why has the author written "and" in italics? Of course, there must be a subtle pun but I don't get what exactly it is.