bug#9439: 23.3.50; adaptive-fill-prefix and adaptive-fill-mode

[Leo]

What are adaptive-fill-prefix and adaptive-fill-mode?

,----[ C-h f comment-valid-prefix-p RET ]
| comment-valid-prefix-p is a compiled Lisp function in `newcomment.el'.
| 
| (comment-valid-prefix-p PREFIX COMPOS)
| 
| Check that the adaptive-fill-prefix is consistent with the context.
| PREFIX is the prefix (presumably guessed by `adaptive-fill-mode').
| COMPOS is the position of the beginning of the comment we're in, or nil
| if we're not inside a comment.
| 
| [back]
`----