[holy ruby programmers batman!] Fwd: hash math subtraction becomes non-destructive

[Markus Prinz]

On 03.03.2008, at 20:06, Giles Bowkett wrote:

> If anyone has a second to play with this, I think it should *probably*
> be added in.

Yeah. Non-destructive subtraction makes more sense.

I've applied the patch and pushed it into my  GitHub-repo.

g, Markus