bug#50798: 28.0.50; Tab line close button is off-center until it is highlighted with the mouse

[Eli Zaretskii]

> From: Lars Ingebrigtsen <larsi@gnus.org>
> Cc: 50798@debbugs.gnu.org,  luangruo@yahoo.com
> Date: Sat, 25 Sep 2021 10:19:31 +0200
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> > You need to have at least two tab-line buttons to see that, because it
> > only shows on the non-current tab.
> 
> I did:
> 
> emacs -Q
> M-x tab-line-mode
> M-x tab-new
> M-x tab-new
> 
> And I'm not seeing any oddities when putting the mouse pointer over any
> parts of the tab line.

Try starting Emacs with a larger font, then.  As in

  emacs -Q -fn "FOO-18"

where FOO is the font you get by default, like "DejaVu Sans Mono" or
something.

AFAIR, the tab-line display is entirely handled by the Emacs native
display features, so GTK should not have any effect on that.