bug#6591: 24.0.50; incorrect doc for `catch'

[Eli Zaretskii]

> From: Andreas Schwab <schwab@linux-m68k.org>
> Cc: =?utf-8?B?xaB0xJtww6FuIE7Em21lYw==?= <stepnem@gmail.com>,
>   6591@debbugs.gnu.org,  rms@gnu.org
> Date: Sun, 11 Jul 2010 17:26:03 +0200
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> > ??? Whatever gave you the idea that BODY is only one form?
> 
> BODY is a single form, BODY... is a sequence of forms.

BODY is whatever follows TAG, till the closing parenthesis.  That's
why it is called "body".  If we would like to say "form", we would do
just that.