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

[Lennart Borgman]

Paul Pogonyshev wrote:
> 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
>   
Is it not enough just to compare the contents of the filled region 
before and after filling?