bug#60990: 29.0.60; New seq release 2.24

[Stefan Monnier]

> What do you see as '"the usual" solutions'?

The solutions used when changes are made in `minibuffer.el`,
`simple.el`, `subr.el`, ...

E.g. using `fboundp`, testing `emacs-major-version`, ...

> To be concrete, if new seq-* functions are added in Emacs 30 do you
> consider it a viable solution if we add backports to Compat or not?

Can't see why not, yes (but I'm not sufficiently familiar with `compat`
to know if there might be some subtle issues).


        Stefan