Update from review

Author: afs

spec/index.html

@@ -6375,8 +6375,8 @@ <h5>hasLANGDIR</h5>
             </pre>
             <p>
               The function `hasLANGDIR` returns <code>true</code> if the
-              argument is a literal with a language
-              tag. Otherwise, the function returns false.
+              argument is a literal with a language tag and a base direction.
+              Otherwise, the function returns <code>false</code>.
             </p>
             <p>If the argument is a literal, the function is equivalent to
               testing for the datatype of the literal being