bug#31576: emacs-lisp-intro.texi - NAME, TITLE inconsistency among @node, @unnumberedsec

[Van L]

> Eli Zaretskii writes:
> 
> You don't need to apologize for reporting something that looks
> strange to you, but please also accept the responses, even if you
> aren't entirely convinced.  There's a lot of history

Thanks for your help. I agree with you.

Looking at

: d6adf7e7 (Glenn Morris             2012-05-28  1206) @node Typing Lists
: 8cda6f8f (Glenn Morris             2007-09-06  1207) @subsection GNU Emacs 
Helps You Type Lists

it makes sense why the node name is short, presentation-wise in the infopage. 

A comment saying this is justified at the first instance will help future 
readers in the texi file.