class RuboCop::Cop::InternalAffairs::NodeMatcherDirective

def insert_scope_directive(corrector, node)
  range = range_with_surrounding_space(node.source_range, side: :left, newlines: false)
  indentation = range.source.match(/^\s*/)[0]
  directive = "\n#{indentation}# @!scope class"
  corrector.insert_after(node, directive)
end