Fix broken regexp.
Julien Barnier writes:
> I recntly noticed that in some specific cases, the final '}' was
> esacped when exproting an emphasis element to LaTeX.
>
> For example, the following element :
>
> /aa/
>
> Is exported to :
>
> \emph{aa\}
>
> This does not append if the string begins with a space or if it
> is ASCII-only. For example, the followig strings are exported
> correctly :
>
> /aaa/
> //
>
> I don't understand why the problem only occurs with non-ASCII chars,
> but I think that the regexp to protect added special chars in the
> org-export-latex-fontify function is missing a '?' in the
> beginning. Tha attached patch corrects it.
Carsten Dominik