Typo in XLIFF 1.1 Spec

<xliff version='1.1'
 xmlns='urn:oasis:names:tc:xliff:document:1.1'
 xmlns:htm='http://www.w3.org/TR/REC-html40'>
 <file original='table.htm' source-language='en' datatype='html'>
  <group restype='table' htm:border='1' htm:cellpadding='5'
   htm:cellspacing='0' htm:width='100%'>
   <group restype='row'>
    <trans-unit id='1' htm:valign='top' htm:width='30%'>
     <source>Text of row 1 column 1</source>
    </trans-unit>
    <trans-unit id='2' htm:valign='top' htm:width='30%'>
     <source>Text of row 1 column 2</source>
    </trans-unit>
   </group>
   <group restype='row'>
    <trans-unit id='3' htm:valign='top' htm:width='30%'>
     <source>Text of row 2 column 1</source>
    </trans-unit>
    <trans-unit id='4' htm:valign='top' htm:width='30%'>
     <source>Text of row 2 column 2</source>
    </trans-unit>
   </group>
  </group>
 </file>
</xliff>