bug#25960: minor gotcha in tutorial

[liam]

> Are you saying that no matter how long you wait, you never see "ESC-"

> in the echo area? If so, what version of Emacs do you have?

>

> ------------

>

> No, I'm saying even if I see ESC- in the echo area, C-g still results in C-M-g is undefined.

>

> Version = GNU Emacs 24.5.1

Right, that was a bug in that version of Emacs.  It is fixed in Emacs 25.1.

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Excellent,  thanks.  I'll look at the daily snapshot ppa for Ubuntu instead of the default version.