bug#37327: Simplifying access to built-in tutorial

[Eli Zaretskii]

> Date: Fri, 06 Sep 2019 21:18:16 +0300
> From: Eli Zaretskii <eliz@gnu.org>
> Cc: 37327@debbugs.gnu.org
> 
> English is still the main language for learning to use Emacs; the
> tutorials in other languages are mainly for people who have
> difficulties in understanding English to the degree that it gets in
> their way of learning Emacs.

Also, and perhaps more importantly, the English version of the
tutorial is maintained by the Emacs developers, so is always up to
date; whereas the translations are updated by translators if and when
they become available, and so could potentially become outdated for
some periods of time.