code: protected void addDescription(ModuleElement mdle, Content dlTree, SearchIndexItem si) {
          String moduleName = utils.getFullyQualifiedName(mdle);
          Content link = getModuleLink(mdle, new StringContent(moduleName));
          si.setLabel(moduleName);
          si.setCategory(resources.getText("doclet.Modules"));
          Content dt = HtmlTree.DT(link);
          dt.addContent(" - ");
          dt.addContent(contents.module_);
          dt.addContent(" " + moduleName);
          dlTree.addContent(dt);
          Content dd = new HtmlTree(HtmlTag.DD);
          addSummaryComment(mdle, dd);
          dlTree.addContent(dd);
      }
docs: Add one line summary comment for the module.
  
  @param mdle the module to be documented
  @param dlTree the content tree to which the description will be added