Test case K-Literals-31a:

The expected result has quotes which is should not. See below:

   <test-case name="K-Literals-31a">
      <description>
         An invalid character reference is not invalid in XPath.  
      </description>
      <created by="Michael Kay" on="2011-07-06"/>
      <dependency type="spec" value="XP20+"/>
      <test><![CDATA["a string &;"]]></test>
      <result>
         <assert-string-value><![CDATA["a string &;"]]></assert-string-value>
      </result>
   </test-case>

Bug fix applied:
...
      <result>
         <assert-string-value><![CDATA[a string &;]]></assert-string-value>
      </result>
...