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

[Drew Adams]

        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.

I suggest just getting rid of the part of the text that refers to "M-x
customize", as its link is confusing, and customizing (with a proper link)
is already mentioned.