Re: fill-paragrapch set the buffer to changed when there is none

[Paul Pogonyshev]

Lennart Borgman wrote:
> Richard Stallman wrote:
> >     If you do fill-paragraph on a paragraph that is already filled in an 
> >     Elisp buffer there is an undo entry added and the buffer is set to 
> >     modified. Is that correct?
> >
> > It would be better to avoid modifying the buffer.  This has not been
> > implemented because it isn't trivial to do.
> >   
> Would it be possible to just set the modified flag correctly? Can the 
> undo list be truncated?

Yes (at least the first part), but it is not easy to detect when a buffer
is not modified.  If you can tell you are not modifying the buffer, you
can as well not call `insert' and friends at all.

Paul