The package summary for java.lang.ref in

    doc/api/java/lang/ref/package-summary.html

contains the HTML

    <DL>
    <DT><B>Since:</B></DT>
      <DD>1.2
    
    <!--
    <h2>Related Documentation</h2>
    
    For overviews, tutorials, examples, guides, and tool documentation, please see:
    <ul>
      <li><a href="">##### REFER TO NON-SPEC DOCUMENTATION HERE #####</a>
    </ul>
    -->, 1.2</DD>
    </DL>

which produces a page that says

    Since:
        1.2 , 1.2

near the bottom of the page. It should probably only have one "1.2".