37.18 Reading Rot13 Messages
Mailing list messages that might offend some readers are sometimes
encoded in a simple code called rot13—so named because it
rotates the alphabet by 13 letters. This code is not for secrecy, as it
provides none; rather, it enables those who might be offended to avoid
ever seeing the real text of the message.
To view a buffer using the rot13 code, use the command M-x
rot13-other-window. This displays the current buffer in another window
which applies the code when displaying the text.