bug#6385: A slightly less aggressive fit-window-to-buffer

[martin rudalics]

> I believe fit-window-to-buffer has become a bit upset and unnecessary
> aggressive because of visual lines. It looks like it need a bit more
> feedback from the display system to be really sure that the buffer is
> entirely visible.
>
> The attached patch is something I have used to get around the problem.
> I am not sure it is the right thing but I am rather sure it does not
> hurt.

IIUC your change defeats the whole point of `pos-visible-in-window-p',
namely to calculate a position without doing a redisplay.  Worse even,
you might end up doing multiple redisplays within a loop.

TRT would be to handle the various line cases within `pos_visible_p'.
And obviously get rid of resizing windows within a loop.

> Of course we need a non-killing version of fit-window-to-buffer, but
> for the moment this patch might be useful.

What is a "non-killing version of fit-window-to-buffer"?

martin