bug#36472: 27.0.50; Convey information by showing line numbers using different colors?

[Dmitry Gutov]

On 02.07.2019 17:30, Eli Zaretskii wrote:

> I wouldn't hold my breath, because this will mean any display routine
that calculates layout will have to call some non-trivial Lisp,
possibly even running a subprocess.

Not really. In my use case it would only look up overlays on the lines 
corresponding to the numbers.

> Why don't you show these indicators on the fringes or in the display
> margins?

Already do. That's what diff-hl does by default.

I'm relaying a feature request here.

But speaking of fringes and margins, we still don't have a good solution 
for multiple packages to shows indicators on the same line.