Rock and Roll Hall of Fame (small) (Photo credit: Wikipedia) I’ve been tweeting in lieu of blogging lately, but sometimes a matter deserves more attention than a string of related tweets. Such is the case with “rock ‘n’ roll.” Dictionaries and style guides differ on how to write a colloquial expression written informally for 60 years or more. “Rock and roll” seems fine and formal, but “rock ‘n’ roll” appears to be the more common form. Even in the 1950s, it was rendered as “r