bug#60587: Patch for adding links to symbols' help documentation

[Ihor Radchenko]

Drew Adams <drew.adams@oracle.com> writes:

> Instead of putting it on the hook when loading the
> code, add/remove it in a :set function.  E.g.
> (untested):
>
> :set (lambda (sym defs)
>        (custom-set-default sym defs)
>        (let ((fun  (if info-make-xref-flag
>                        #'add-hook
>                      #'remove-hook)))
>          (funcall fun 'Info-selection-hook
>                       'info-make-xrefs)))
>
> 3. Maybe add a toggle command for the option, so
> users can switch the behavior anytime, on the fly.

What about using `add-variable-watcher'?

-- 
Ihor Radchenko // yantar92,
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