def handle(indicator, code, tailch, rspace, lspace)
      case indicator
      when '|=', '|=='
        rspace = nil if tailch && !tailch.empty?
        add_text(lspace) if lspace
        escape_capture = !((indicator == '|=') ^ @escape_capture)
        src << "begin; (#{@bufstack} ||= []) << #{@bufvar}; #{@bufvar} = #{@bufval}; #{@bufstack}.last << #{@escapefunc if escape_capture}((" << code
        add_text(rspace) if rspace
      when '|'
        rspace = nil if tailch && !tailch.empty?
        add_text(lspace) if lspace
        result = @yield_returns_buffer ? " #{@bufvar}; " : ""
        src << result << code << ")).to_s; ensure; #{@bufvar} = #{@bufstack}.pop; end;"
        add_text(rspace) if rspace
      else
        super
      end
    end
def handle(indicator, code, tailch, rspace, lspace)
      case indicator
      when '|=', '|=='
        rspace = nil if tailch && !tailch.empty?
        add_text(lspace) if lspace
        escape_capture = !((indicator == '|=') ^ @escape_capture)
        src << "begin; (#{@bufstack} ||= []) << #{@bufvar}; #{@bufvar} = #{@bufval}; #{@bufstack}.last << #{@escapefunc if escape_capture}((" << code
        add_text(rspace) if rspace
      when '|'
        rspace = nil if tailch && !tailch.empty?
        add_text(lspace) if lspace
        result = @yield_returns_buffer ? " #{@bufvar}; " : ""
        src << result << code << ")).to_s; ensure; #{@bufvar} = #{@bufstack}.pop; end;"
        add_text(rspace) if rspace
      else
        super
      end
    end
Handle the <%|= and <%|== tags