bug#37141: 27.0.50; spelling doesn't work in XML comments

[Eli Zaretskii]

> Date: Thu, 22 Aug 2019 15:50:04 +0200
> From: Vincent Lefevre <vincent@vinc17.net>
> Cc: 37141@debbugs.gnu.org
> 
> On 2019-08-22 16:34:09 +0300, Eli Zaretskii wrote:
> > tags 37141 notabug
> > thanks
> 
> I disagree. That would be at least a documentation bug.

I don't see why.  See below.

> > That's a feature, see ispell-skip-html.
> 
> This is not documented in the Emacs manual.

We don't document every obscure feature in the manual, that would make
it too large.  Some user options are left out.  I don't see why this
one is important enough to add it, sorry.

> BTW, XML is not HTML.

Yes, and neither is SGML.  But a variable has a doc string, which is
supposed to say more than just the name.