class CodeRay::Encoders::HTML

def begin_line kind
  if style = @span_for_kind[@last_opened ? [kind, *@opened] : kind]
    if style['class="']
      @out << style.sub('class="', 'class="line ')
    else
      @out << style.sub('>', ' class="line">')
    end
  else
    @out << '<span class="line">'
  end
  @opened << kind
  @last_opened = kind if @options[:css] == :style
end