bug#6374: 23.2; manual language fixes

[Eli Zaretskii <eliz@gnu.org>]

> Cc: Warren L Dodge <warrend@Tektronix.com>,  6374@debbugs.gnu.org
> From: Glenn Morris <rgm@gnu.org>
> Date: Thu, 10 Jun 2010 01:08:35 -0400
> 
> Eli Zaretskii wrote:
> 
> > Emacs supports radix values beyond 16, so a-f is not enough.  It's
> > actually a-z.
> 
> Is the doc-string of read-quoted-char-radix (which is what the manual
> section in question is talking about) wrong then?

No, it's not wrong.

>   Legitimate radix values are 8, 10 and 16
> 
> These are also the only choices allowed when customizing
> read-quoted-char-radix.

I don't think we should rewrite the manual for a simple extension of
the current capabilities, when it is done.  The Lisp reader already
supports any radix up to 36.  So the intentionally vague language in
the manual seems fine to me.