Re: doc string for global-hl-line-mode should not mention M-x customize

[Richard Stallman]

    C-h v already adds "You can customize this variable". The doc string
    should not also have this text: "use either M-x customize...".  The
    link on this occurrence of "customize" does not take you to the
    Customize buffer for the option; it takes you to the doc string of
    command `customize', which is undesirable here.

That text is generated by define-minor-mode when it constructs the
defvar.  So I think it will not be trivial to make it produce a
special kind of button.  Is there a way for a doc string to do that?
Anyway, someone can feel free to improve this.