Re: doc elisp intro cross reference fixes

[Stefan Monnier]

>    I don't see the harm is adding a "redundant" custom-var, as long as the
>    variable does not appear in any normal group and is thus only accessed via
>    M-x customize-variable or M-x set-variable or somesuch.

> One obvious harm could be two "dueling entries" in the
> custom-set-variables form.

It's a source of confusion, maybe, but it's not harmful as far as I know.
More specifically, such problems are not serious enough to force us
to fix them all before we can change the behavior of defvar.
By the way: currently we already have those duelling entries in M-x
set-variable.  And even if we "fix" set-variable so it does not
show enable-multibyte-characters (because it doesn't have a * in its
docstring), we still have the "duelling" effect in that set-variable
shows one and M-x customize-variable shows the other and the user
has no idea what's the difference.
I.e. this problem is orthogonal with what we're discussing.


        Stefan