Re: Don't complain about changed file when it hasn't changed

[Eli Zaretskii <eliz@gnu.org>]

> From: Stefan Monnier <monnier@iro.umontreal.ca>
> Date: Tue, 30 Aug 2016 11:46:36 -0400
> 
> >  -- Function: ask-user-about-supersession-threat filename
> >      This function is used to ask a user how to proceed after an attempt
> >      to modify an buffer visiting file FILENAME when the file is newer
> >      than the buffer text.  Emacs detects this because the modification
> >      time of the file on disk is newer than the last save-time of the
> >      buffer.  This means some other program has probably altered the
> >      file.
> 
> > Some of that will no longer be accurate once we install your changes.
> 
> Hmm... actually, this documentation is still valid, because it specifies
> when the function is called (which is not changed by my patch) rather
> than what the function does.

We are splitting hair.

The problematic place (for me) is the "modification time of the file
on disk is newer", which implies that this is the only test for the
detection of supersession-threat.