On 11/2/19 10:54 AM, Eli Zaretskii wrote:
>> Cc: 38026@debbugs.gnu.org
>> From: Hong Xu <hong@topbug.net>
>> Date: Sat, 2 Nov 2019 10:07:03 -0700
>>
>> On 11/2/19 1:03 AM, Eli Zaretskii wrote:
>>> Thanks, but I don't see how this clarifies the issue.  Can you tell
>>> more about your motivation?
>>>
>>
>> The motivation is to clarify what a negative NABS means. From the current document, it is unclear that NABS can be negative.
> 
> In that case, the patch is insufficient.  First, we don't document
> minibuffer-default in the manual, so referencing it will leave the
> reader wondering what it is, and how it is set and used.  Second, the
> doc string of goto-history-element should also explain what is the
> meaning of negative values.  And third, several functions bind
> minibuffer-default to certain values, and I'm not sure this variable
> can usefully be documented in a manual.
> 
> So I think the text needs not reference minibuffer-default, but
> instead talk about "future history", like the Emacs manual does.
> 

Thanks. Sounds like a good idea. I've attached an update.