bug#38164: quit-restore-window doesn't restore point in man

[Juri Linkov]

>> @@ -1469,8 +1469,10 @@ Man-bgproc-sentinel
>>
>>         (when delete-buff
>>           (if (window-live-p (get-buffer-window Man-buffer t))
>> -            (quit-restore-window
>> -             (get-buffer-window Man-buffer t) 'kill)
>> +            (progn
>> +              (quit-restore-window
>> +               (get-buffer-window Man-buffer t) 'kill)
>> +              (select-window (old-selected-window)))
>>             (kill-buffer Man-buffer)))
>
> I'm completely lost now.  Can you tell me in a detailed fashion what
> goes wrong here?  Is the window stored in (nth 2 quit-restore) the
> wrong window right from the outset?  Or is it in a sense falsified by
> what happens later during minibuffer interaction?

(progn
  (man "XYZ")
  (read-string "--> "))

'read-string' activates the minibuffer, but asynchronous Man-bgproc-sentinel
later calls 'quit-restore-window' that selects its previous window,
ignoring the fact that now the selected window was in the minibuffer.
So we need an exception for the case of active minibuffer.