class RuboCop::Cop::Style::WhileUntilDo

def on_while(node)
  return unless node.multiline? && node.do?
  add_offense(node.loc.begin, message: format(MSG, keyword: node.keyword)) do |corrector|
    do_range = node.condition.source_range.end.join(node.loc.begin)
    corrector.remove(do_range)
  end
end