class RuboCop::Cop::Style::NestedModifier

def autocorrect(node)
  return unless node.if_type? && node.parent.if_type?
  range = range_between(node.loc.keyword.begin_pos,
                        node.parent.condition.source_range.end_pos)
  lambda do |corrector|
    corrector.replace(range, new_expression(node.parent, node))
  end
end