[Oberon] Possible typo in Zonnon EBNF description

[David Lightfoot]

Aubrey.McIntosh at Alumni.UTexas.Net wrote:
> I am looking at section /11. Constants on page 57 of the July 28, 2009
> Zonnon language report.
> The production ScaleFactor includes the term ["+" | "" ]
> I suspect this should be ["+" | "-" ]
>
>   
Dear Aubrey
Quite so! And it has been wrong for a very long time! (It is, however, 
correct in section 4.4.)
Thanks for your careful reading.

regards

David Lightfoot