bug#62536: 30.0.50; Can we add """ ... """ electric pair in elixir, just like python

[Wilhelm Kirschbaum]

> > And in electric-layout-rules you _can_, I think, identify
> > triple quotes using a function as described in the last
> > paragraph of its docstring.
> Yes, I tested this earlier and it does work.

Even though it works, it does not play nice with the custom psif,
because the layout rules seems to trigger before the hook.