class RuboCop::Cop::Style::SingleLineBlockParams

def autocorrect(corrector, node, preferred_block_arguments, joined_block_arguments)
  corrector.replace(node.arguments, "|#{joined_block_arguments}|")
  node.each_descendant(:lvar) do |lvar|
    if (preferred_lvar = preferred_block_arguments[lvar.source])
      corrector.replace(lvar, preferred_lvar)
    end
  end
end