bug#30891: 26.0.91; indent of malformed lisp

[Eli Zaretskii]

> From: Noam Postavsky <npostavs@gmail.com>
> Cc: 30891@debbugs.gnu.org
> Date: Wed, 24 Oct 2018 19:39:44 -0400
> 
> > I'd rather go back to the old code, and let the new Lisp indent
> > functions mature on master.  Alternatively, we could leave this
> > problem alone and fix it later.  But making all these changes at the
> > 95th minute before Emacs 26 is released makes very little sense to me.
> 
> Okay to push just the error avoidance part to emacs-26 now?

Yes, please.