code: function (id_base) {
          this.span = document.createElement('span');
          this.span.id        = id_base + '-page-report';
          this.span.className = this.paginator.get('pageReportClass');
          this.update();
          
          return this.span;
      }
docs: Generate the span containing info formatted per the pageReportTemplate
  attribute.
  @method render
  @param id_base {string} used to create unique ids for generated nodes
  @return {HTMLElement}