Log Message:
Update ruby2ruby to 2.0.5.

=== 2.0.5 / 2013-04-25

* 2 bug fixes:

  * Fixed attrasgn w/ multiple keys: a[x, y] = z. (derula)
  * Fixed error w/ attr_* detection when more than 1 ivar/iasgn exist in body.

=== 2.0.4 / 2013-03-28

* 1 bug fix:

  * Fixed attr_* generators in cases where the body isn't
    idiomatic. (robertfeldt)