class RuboCop::Cop::Layout::EmptyLineAfterMagicComment

def investigate(source)
  return unless source.ast &&
                (last_magic_comment = last_magic_comment(source))
  return if source[last_magic_comment.loc.line].strip.empty?
  offending_range =
    source_range(source.buffer, last_magic_comment.loc.line + 1, 0)
  add_offense(offending_range, location: offending_range)
end