Re: save-excursion doesn't always work

[David Kastrup <David.Kastrup@t-online.de>]

"Stefan Monnier <foo@acm.com>" <monnier+gnu.emacs.help/news/@flint.cs.yale.edu> writes:

> >> It might do a few things slightly differently, but it will modify the
> >> buffer anyway, even if the end result is exactly the same as the
> >> starting point (e.g. it will first turn all \n into spaces and then
> >> turn them back into \n).
> > We are not talking about modification of the buffer, but about marks
> > being moved around in seemingly random manner.
> 
> Unless they're explicitly moved, marks only move in response to
> buffer modifications.

Yes.  But if you do modifications that end up doing nothing, the
marks may move or not.  The former is more of a nuisance than the
latter.

> Maybe the default filling function works better than AUCTeX in this
> regard (I don't know) but even if it does, it doesn't work 100% as
> the user wants it to.

Come off it.  Nobody uses M-q as a substitute for forward-paragraph on
filled text.  It is a text-changing command.  I don't think people
will complain much if it changes text.  They will complain if regions
and marks end up on the wrong side of (maybe adjusted) white space,
though.  _Regardless_ of whether there were indeed formatting changes
or not.

-- 
David Kastrup, Kriemhildstr. 15, 44793 Bochum