bug#38248: help-follow-symbol silent when no symbol was found

[Lars Ingebrigtsen]

Juanma Barranquero <lekktu@gmail.com> writes:

> That's not just inconsistent, but a bit disconcerting, as sometimes
> following a symbol can be slow. In my build, it takes a second or more
> to show the symbol documentation, so when there's no symbol I stand
> waiting for something to happen for a couple of seconds.
>
> The following patch fixes that. The only reason against I can think of
> is when `help-follow-symbol' is called from elisp, because it will now
> signal an error.  However, at least in the Emacs sources
> help-follow-symbol is never called from elisp, just as a keybinding or
> menu entry.

Adding an error-out here I think should be OK.  I googled a bit and
couldn't see anything out-of-tree that uses that command as a function.

-- 
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   bloggy blog: http://lars.ingebrigtsen.no