Answer:
He reinforces the character's ideas about Parisian barbershops.
Explanation:
Mark Twain was an American author best known by The Adventures of Tom Sawyer and The Adventures of Huckleberry Finn, two books that share characters and are connected in some different ways. Repetition is a rhetorical device used for many purposes; among them, we can find reinforcing a specific idea, which in this case is that the speaker did not want to gen involved with Parisian barbershops anymore; readers can see this through the repetition of the words never never.
