bug#24649: 24.5; Why no standard error for "Trailing garbage following expression"?

[Eli Zaretskii]

> From: Lars Ingebrigtsen <larsi@gnus.org>
> Cc: drew.adams@oracle.com,  24649@debbugs.gnu.org
> Date: Fri, 23 Aug 2019 10:16:04 +0200
> 
> >> > +            xsignal1 (Qinvalid_read_syntax,
> >> > +                      build_string ("Trailing garbage following 
> >> > expression"));
> >> 
> >> There weren't any comments, so I've now applied this.  If somebody has a
> >> better idea for the error signal, please amend.
> >
> > Thanks, but this change needs to be reflected in the ELisp manual,
> > where currently invalid-read-syntax is documented for a different use
> > case.
> 
> Let's see...  Qargs_out_of_range would be inappropriate...  And
> Qwrong_type_argument...  Perhaps the closest one of the predefined
> errors would be Qend_of_file?
> 
> Or we could have a new one.  `garbage-follows-expression'?  That's
> pretty explicit.

We don't have to invent a new symbol, we just need to document in
"Standard errors" that this error is also signaled an the situation
described in this bug report.