rubinius/rubinius — pull request #1969 by mbj (2012-10-21 23:10:28+00:00)
Title: Add accessor for @vcall_style in AST::Send

This allows to [mutate](https://github.com/mbj/mutant/blob/9fcb271637d28f25519b4704c0933a575fbc7fc7/lib/mutant/mutator/call.rb#L75) the rubinius AST without calling instance_variable_set.

Specs pass on my machine.