bug#43609: 28.0.50; eldoc-documentation-function [vs new eldoc-display-functions]

[João Távora]

I must have given you the wrong version of the file,
sorry, I had that problem too at some point.  Probably
forgot to save before attaching.  If only there was some
way to control versioning of source files...

Anyway, your technique is perfectly valid too, in fact that's
the approach that `eldoc-display-in-echo-area` uses. But it's
slightly more correct to read the information for docs directly
because the buffer might eventually be rendered in ways that
don't make sense for tooltips.

João