Re: [PATCH v5 3/3] rebase: add a config option for --rebase-merges

> > +rebase.merges::
> > +     Whether and how to set the `--rebase-merges` option by default. Can
> > +     be `rebase-cousins`, `no-rebase-cousins`, or a boolean. Setting to
> > +     true is equivalent to `--rebase-merges` without an argument, setting to
> > +     `rebase-cousins` or `no-rebase-cousins` is equivalent to
> > +     `--rebase-merges` with that value as its argument, and setting to false
> > +     is equivalent to `--no-rebase-merges`. Passing `--rebase-merges` on the
> > +     command line without an argument overrides a `rebase.merges=false`
> > +     configuration but does not override other values of `rebase.merge`.
>
> I originally believed that having the boolean values as an option here
> created unnecessary complexity but I was convinced during Review Club
> that the tradeoff for a user who just wants to turn this on is fine. I'm
> just wondering whether this option will possibly have additional values
> in the future. If so, what would a user expect from setting this config
> to true?