class RuboCop::Cop::Style::TrailingUnderscoreVariable

def on_masgn(node)
  return unless (range = unneeded_range(node))
  good_code = node.source
  offset = range.begin_pos - node.source_range.begin_pos
  good_code[offset, range.size] = ''
  add_offense(node, range, format(MSG, good_code))
end