class CodeRay::Encoders::HTML

def end_group kind
  if $CODERAY_DEBUG && (@opened.empty? || @opened.last != kind)
    warn 'Malformed token stream: Trying to close a token (%p) ' \
      'that is not open. Open are: %p.' % [kind, @opened[1..-1]]
  end
  if @opened.pop
    @out << '</span>'
    @last_opened = @opened.last if @last_opened
  end
end