bug#70664: 29.3; vtable-insert-object cannot insert at top of table

[Eli Zaretskii]

> From: Joost Kremers <joostkremers@fastmail.fm>
> Date: Tue, 30 Apr 2024 11:30:47 +0200
> 
> The current implementation of `vtable.el` provides the function
> `vtable-insert-object` to add an object to the vtable. Its signature is this:
> 
>     vtable-insert-object table object &optional after-object
> 
> The doc string says that if AFTER-OBJECT is not provided, the new object is
> added to the end of the table. This makes it impossible to add an object as 
> the
> first element of the table.
> 
> Note that although this e-mail is written from Emacs 29.3, the version of
> `vtable.el` in master has the same problem.

Adam, WDYT?  You did something similar with vtable-update-object,
AFAIR.