Thank you Dima.

Do you happen to remember what was the firs Sage version including this 
ticket ?

Le mardi 25 août 2020 à 10:35:11 UTC+2, dim...@gmail.com a écrit :

> git is your friend here, telling you that it happened in commit
> d55cb7744b6500619664f136c18c4b2bb70c8b70
>
> $ git log -p build/pkgs/ipython/package-version.txt
> ....
> commit d55cb7744b6500619664f136c18c4b2bb70c8b70
> Author: Volker Braun <vbrau...@gmail.com>
> Date: Tue Jul 12 00:32:45 2016 +0200
>
> Update IPython 5.0
>
> diff --git a/build/pkgs/ipython/package-version.txt
> b/build/pkgs/ipython/package-version.txt
> index fae6e3d04b..0062ac9718 100644
> --- a/build/pkgs/ipython/package-version.txt
> +++ b/build/pkgs/ipython/package-version.txt
> @@ -1 +1 @@
> -4.2.1
> +5.0.0
>
> searching this commit on trac gives you 
> https://trac.sagemath.org/ticket/21006
>
> HTH
> Dima
>
> On Tue, Aug 25, 2020 at 9:21 AM Emmanuel Charpentier
> <emanuel.c...@gmail.com> wrote:
> >
> > Dear all,
> >
> > 9.2.beta8 introduced the use of IPython 7 in Sage, which broke the emacs 
> interface sage-shell-mode ; I'm trying to fix it.
> >
> > This needs to account for three versions of IPython
> >
> > "Antique" Sage : readline interface to IPython <5
> > "Modern" Sage, up to 9.2.beta7 : pseudo-terminal to IPython 5
> > "Newer" Sage, i. e. 9.2.beta9 and later : readline, start sage with the 
> --simple-prompt option introduced in 9.2.beta9.
> >
> > [ Note that 9.2.beta8 is a lost cause : it would need --simple-prompt, 
> but doesn't support it... ]
> >
> > This can be done at startup, but is slow. I'd like to offer the 
> possibility to configure that in init.el ; in order to offer useful 
> guidelines to the user, I need to know the precise limit between "Antique" 
> and "Modern" Sage. Hence my question :
> >
> > What was the first version of Sage using IPython 5 ?
> >
> > Thanks in advance,
> >
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> .
>

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