bug#35163: 25.1; `narrow-to-region' docstring no mention of args

[Eli Zaretskii]

> From: Noam Postavsky <npostavs@gmail.com>
> Date: Mon, 08 Apr 2019 19:09:39 -0400
> Cc: , Emanuel Berg <moasenwood@zoho.eu>
> 
> > Or at least a clear description of the problem.
> 
> To be fair, message [11] is fairly clear and pretty close to what Glenn
> wrote (perhaps it misses the emphasis on satisfying checkdoc).

Obviously, it wasn't clear enough to me, or I wouldn't have asked the
follow-up questions.  When it became clear, I pushed a change within
minutes.

> Things unfortunately derailed after that.
> 
> An 80+ line elisp riddle on a report about a docstring bug is surely a
> sign something has gone horribly wrong...

Indeed.