bug#22583: 25.1.50; find-function-search-for-symbol don't call find-function-after-hook

[Tino Calancha]

> find-function-search-for-symbol is a querying function. It can be used by 
> different consumers, e.g. xref-location-marker.
> I'm not sure the user would want find-function-after-hook to run in every such 
> case.
Right: the hook may be unnecessary called many times. Not good.

> Maybe help-variable-def's button definition's help-function should run the hook 
> explicitly instead.
Thanks for the tip. This way looks more sensible.

help-mode.patch
Description: Text document