bug#31579: emacs-lisp-intro.texi - line 1267 - echo area shows `4 (#o4, #x4, ?\C-d)' and not just `4'.

[Eli Zaretskii]

> From: Van L <van@scratch.space>
> Date: Thu, 24 May 2018 20:38:12 +1000
> 
> It could say, ``You will see the number @code{4} (and other details in a 
> list) appear in the echo area.''

I preferred to describe the other details in a footnote, so that the
text sounds less vague, and thus runs a lower risk of confusing
people.

(The original text evidently wasn't updated when the display of
integer evaluation was changed sometimes during the Emacs 20.x
series.)

Thanks.