Re: Unbalanced change hooks (part 2) [Documentation fix still remaining]

[Eli Zaretskii]

> From: Stefan Monnier <address@hidden>
> Date: Tue, 09 Aug 2016 15:09:02 -0400
> 
> It's OK if we call it once for the whole region and then modify various
> chunks of the region one by one, yes.  In that case, it's still called
> before those modification.
> 
> Basically, It think we should guarantee that if buffer position N is
> changed, then N is between the BEG and END of the latest call to b-c-f
> (with END potentially adjusted to account for the other modifications
> that took place in the mean time).

AFAICT, this is what happens, indeed, except that the call to
before-change-functions in some cases does not precede the first
modification of the series.  IOW, by the time the hook is called, some
modifications were already done.