bug#81597: 30.2; Eldoc: "Nothing to follow at point" despite text appearing like a link (underlined, hoverable, with URL tooltip)

Hi there,

To the list moderator: Sorry, my previous attempts to send this came 
directly from "report-emacs-bug" and contained a lot of system 
information which I understand is not supposed to be sent to the list, 
despite being pre-filled by Emacs? Here's a clean version instead:


When a language server emits documentation in Markdown format, eldoc 
attempts to render this in its buffer, including making links 
clickable/followable. Most of those seem to work, but some don't. In 
such cases, the text is displayed as if it were a link (it's underlined 
and reacts to hover) but following it doesn't work:

  markdown-follow-link-at-point: Point is not at a Markdown link or URL
  markdown-follow-thing-at-point: Nothing to follow at point

Function names mentioned inside help text in elixir-ls show this 
behavior, for example. The URL in the tooltip points to documentation 
for that specific function on Hexdocs, but the link doesn't work when 
clicked.

The URL is however contained in the "help-echo" text property, in both 
working and non-working examples. It might be a bug because it feels 
misleading when the text looks and behaves like a link in the UI but 
can't be clicked/browsed.

Some other editors, e.g. Kate and Codium, seem to have decided that such 
text shouldn't be a link at all and just display it in a monospaced font 
with different background colors. But it feels like the more useful 
behavior for the user would be to let them follow the link to the 
documentation since it's already there.

Cheers,

Ramón