bug#62575: 29.0.60; Tabs are not showing the right names of the buffers

[Eli Zaretskii <eliz@gnu.org>]

> Date: Sat, 1 Apr 2023 13:19:51 +0200
> Cc: 62575@debbugs.gnu.org
> From: Claudio Grondi <claudio.grondi@freenet.de>
> 
> Below the steps required to reproduce the bug:
> 
> 1. ~ $ emacs -Q
> 2. Menu -> Options -> Show/Hide -> Tab Bar (gives Tab *scratch*)
> 3. 1x click on rightmost * in the Tab Bar to create a new Tab (gives 2x 
> *scratch* Tabs)
> 4. With the rightmost (second) Tab open ~/.emacs (gives 1x *scratch* and 
> 1x .emacs Tabs)
> 5. 2x click on rightmost * in the Tab Bar to create twp new Tabs (gives 
> 1x *scratch* and 3x .emacs Tabs)
> 6. with rightmost Tab active kill the .emacs buffer [C-x k] (the Tabs 
> label turns  to *scratch the other two Tabs labeled .emacs keep their 
> labels, so there are 1x *scratch*, 2x .emacs, 1x *scratch* Tabs)
> 7. *click the second Tab labeled* .emacs' (result: the label of the Tab 
> turns to *Messages*. the Tab Bar shows *scratch* *Messages* .emacs 
> *scratch* )
> 
> The bug: the third Tab still keeps its  .emacs  label, the click on the 
> second Tab labeled  .emacs  did not show the .emacs file, but the buffer 
> *Messages*.

Thanks.  Now I see the problem and can work on fixing it.