anchor.diff:  
       <h:column rendered="#{questionScores.sortType eq 'comments' && questionScores.sortAscending}">
         <f:facet name="header">
  -        <h:commandLink title="#{msg.t_sortComment}" action="questionScores">
  +        <h:commandLink title="#{msg.t_sortComments}" action="questionScores">
             <h:outputText value="#{msg.comment}" />
             <f:param name="sortAscending" value="false" />
             <h:graphicImage alt="#{msg.alt_sortCommentDescending}" rendered="#{questionScores.sortAscending}" url="/images/sortascending.gif"/>
  
positive.code:     <!-- COMMENT -->
      <h:column rendered="#{questionScores.sortType!='comments'}">
       <f:facet name="header">
        <h:commandLink title="#{msg.t_sortComment}" id="comments" action="questionScores">
        <f:actionListener
           type="org.sakaiproject.tool.assessment.ui.listener.evaluation.QuestionScoreUpdateListener" />
          <f:actionListener
  
negative.code:     
      <h:column rendered="#{questionScores.sortType eq 'comments' && !questionScores.sortAscending}">
        <f:facet name="header">
          <h:commandLink title="#{msg.t_sortComments}" action="questionScores">
            <h:outputText value="#{msg.comment}" />
            <f:param name="sortAscending" value="true" />
            <h:graphicImage alt="#{msg.alt_sortCommentAscending}" rendered="#{!questionScores.sortAscending}" url="/images/sortdescending.gif"/>
  