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

[Daniel Colascione <dancol@dancol.org>]

On 08/30/2016 11:06 AM, Daniel Colascione wrote:
> On 08/30/2016 11:01 AM, Alan Mackenzie wrote:
>> Hello, Daniel.
>>
>> On Tue, Aug 30, 2016 at 10:46:44AM -0700, Daniel Colascione wrote:
>>> On 08/30/2016 10:42 AM, Eli Zaretskii wrote:
>>>>> Cc: monnier@iro.umontreal.ca, emacs-devel@gnu.org
>>>>> From: Daniel Colascione <dancol@dancol.org>
>>>>> Date: Tue, 30 Aug 2016 10:27:45 -0700
>>
>>>>> +The region given to each of these functions is a conservative
>>>>> +approximation of the region about to changed.  After running the
>>>>> +before-change-functions, Emacs will make zero or more fine-grained
>>>>> +buffer changes and run after-change-functions for each.  Do not
>>>>> expect
>>>>> +before-change-functions and after-change-functions to be called in
>>>>> +balanced pairs.
>>
>>>> The last sentence here is repeated afterwards, for no good reason.
>>>> (Also, the markup is missing, but that's just an aside.)
>>
>>> I figured it was a good idea to highlight this fact directly in the
>>> variable documentation blob. I can add a "see below" link.
>>
>> Why are you advocating this?  It is not true.

It's not true. If it's true except for one time in a million, it's not 
true. Programs need to be written for the world we inhabit, not the one 
we want. Relying on behavior that's usually but not always the case is 
antithetical to software robustness.