class CodeRay::Tokens

def fix
  raise NotImplementedError, 'Tokens#fix needs to be rewritten.'
  # tokens = self.class.new
  # # Check token nesting using a stack of kinds.
  # opened = []
  # for type, kind in self
  #   case type
  #   when :begin_group
  #     opened.push [:begin_group, kind]
  #   when :begin_line
  #     opened.push [:end_line, kind]
  #   when :end_group, :end_line
  #     expected = opened.pop
  #     if [type, kind] != expected
  #       # Unexpected end; decide what to do based on the kind:
  #       # - token was never opened: delete the end (just skip it)
  #       next unless opened.rindex expected
  #       # - token was opened earlier: also close tokens in between
  #       tokens << token until (token = opened.pop) == expected
  #     end
  #   end
  #   tokens << [type, kind]
  # end
  # # Close remaining opened tokens
  # tokens << token while token = opened.pop
  # tokens
end