Breaking backwards compatiblity

[bearophile]

Walter:

> And sometimes, a name change can be a huge win - the invariant=>immutable one is 
> an example. But I think that's an exceptional case, not a rule.

I was among the ones that have asked for that name change. But "immutable" is a quite long word. Now I think the "val" used by Scala is better, it uses less space for something I use often enough. "imm" is another option, but it looks less nice :-)

Bye,
bearophile