Fixed AST for bootstrap operators.
Fixed AST for bootstrap operators.

YorickPeterse/ruby-ll,telekomatrix/ruby-ll,telekomatrix/ruby-ll,YorickPeterse/ruby-ll,YorickPeterse/ruby-ll,YorickPeterse/ruby-ll,ttasanen/ruby-ll,telekomatrix/ruby-ll,telekomatrix/ruby-ll,ttasanen/ruby-ll,ttasanen/ruby-ll