Documentation

[Sean Sieger]

How does this,

,----[ C-h k C-x o ]
| C-x o runs the command other-window
| (other-window ARG &optional ALL-FRAMES)
|    which is an interactive built-in function.
| 
| Select the ARG'th different window on this frame.
| All windows on current frame are arranged in a cyclic order.
| This command selects the window ARG steps away in that order.
| A negative ARG moves in the opposite order.  If the optional second
| argument ALL_FRAMES is non-nil, cycle through all frames.
`----

come about? That is, how do you insert documentation into a message
(or anywhere else), if that is indeed what has been done when I see this
format in a message?
-- 
Sean Sieger