[luatex] [A bit out of topic] Extend the arithmetic expressions parser from lpeg example

[Christophe Jorssen]

2011/6/28 Taco Hoekwater <taco at elvenkind.com>:
>
> There were a bunch of small errors in your lua code, see attachment.
>

You're right. Lots of small errors (I set the complete minimal non
working exemple too quickly...). Thanks a lot for the corrected file
:-)

Best regards

-- 
Christophe