Stefan Monnier <monnier@iro.umontreal.ca> writes:

>> +  (if (string= major-mode "Info-mode")
>
> `major-mode` contains a symbol, so better do (eq major-mode 'Info-mode).
> This said, I don't know why you have that test.  Any reason you're
> worried about this being called from another buffer?

No, not any longer 😊.  In the meantime I mentioned the example of
'emacs-news-mode' also linking quoted symbols (and Info references) to
their documentation.  So 'info-link-to-help-mode' is now a local
minor-mode which should work for any buffer.  (I understood that it's
supposed to be the default for all *info* buffers.)

If all agree on this direction I'll adjust the Info documentation
accordingly..

But then, doesn't it makes sense to develop such a universal mode
independent of info.el, e.g. like a 'bug-reference-mode'?

Thanks for your opinions