I think we should change only multiple right hand side (or mrhs in parse.y),
and leave left hand side (lhs) like it is nowadays.

Call argument list (call_args) might be good candidate for an update too.
But function arguments shouldn't be (f_args) updated following the same
reasoning of ambiguity what hipster talks here:

> a=1, how should 2, 3, 4 be distributed over *b and *c?

The same reasoning applies for lhs.

	- Aleksi