Re: Tabs

[Juri Linkov]

>> >> Only GTK+ has an external tool-bar
>> >
>> > I think NS has an external tool bar as well, no?
>> 
>> NS has an external tool bar and no tab bar,
>
> But that's temporary, at least we hope so, right?

Right, we need to find a macOS developer who likes tabs enough
to implement NS tab-bar :-)

>> so its default value is nil.
>
> Why not make it identical to GTK?

Because then I don't know how to explain in the docstring
why NS has the default value 'tab-bar-lines'.  This is
how the docstring would look in this case:

  In GTK+ and NS that use the external tool bar, the default value is
  \\='(tab-bar-lines) which means that adding/removing a tab bar does
  not change the frame height.