Is there a way to make \n or \r characters visible in vim? (I want to be able to see if the csv file I am looking at uses just \n or \r and \n at the end of lines.
:setl fileformat?
dos means CR-LF (consistently; if only some lines contain both, it'll be listed as unix, and you'll see ^M characters at the end of those lines), unix means LF; mac means only CR newlines.