bug#46369: 28.0.50; Bind clone-buffer into the new C-x x keymap

[Lars Ingebrigtsen]

Sean Whitton <spwhitton@spwhitton.name> writes:

> I find that clone-buffer is a useful companion command to
> rename-uniquely so would like to request binding C-x x n to that (the
> letter 'n' follows Info-mode binding it to M-n).
>
> Patch attached in case that makes this easier.

Makes sense; applied now.

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