Using prefix argument to create a new shell buffer

[semente]

With C-u N M-x shell-pop I can create a new buffer called shell-N. Would be great if with `C-u M-x shell-pop' (without prefixing a number) I could create a new shell buffer.

So for example: if I have the shells shell-1 and shell-3, with C-u M-x shell-pop I could get shell-4 without the needing of type a number.

[Fuco1]

Why not shell-2 instead? I'd like it more to fill the spaces, but that can easily be made configurable. Good idea all in all.

[semente]

It could fill the spaces. After all, I now think it is better as well.

[syohex]

@semente Please update to latest version. If you still have problem, please reopen this issue.