class RuboCop::Cop::Layout::MultilineBlockLayout

def autocorrect_arguments(corrector, node)
  end_pos = range_with_surrounding_space(
    range: node.arguments.source_range,
    side: :right,
    newlines: false
  ).end_pos
  range = range_between(node.loc.begin.end.begin_pos, end_pos)
  corrector.replace(range, " |#{block_arg_string(node.arguments)}|")
end