bug#57250: emacs-lisp-mode not highlighting single characters `k' in comments

[uzibalqa]

------- Original Message -------
On Tuesday, August 16th, 2022 at 7:11 PM, Stefan Kangas 
<stefankangas@gmail.com> wrote:


> uzibalqa via "Bug reports for GNU Emacs, the Swiss army knife of text
> editors" bug-gnu-emacs@gnu.org writes:
>
> > But if the character sequence within tick ` and a single quote ' is a single
> > character, the character does not get highlighted.
> >
> > Example:
> >
> > ;; Insert `k' for words with initial values.
> >
> > The character k does not get highlighted.
>
>
> That's because k here is more likely to be a key than a Lisp symbol.
>
> So I think this is expected.

What is the reason for the highlight for more than a single character?