class RuboCop::Cop::SpaceCorrector

def add_space(processed_source, corrector, left_token, right_token)
  @processed_source = processed_source
  corrector.insert_after(left_token.pos, ' ') unless left_token.space_after?
  return if right_token.space_before?
  corrector.insert_before(right_token.pos, ' ')
end