Fix flag name -XDisambiguateRecordFields

docs/users_guide/flags.xml

@@ -659,11 +659,11 @@
 	      <entry><option>-XNoArrows</option></entry>
 	    </row>
 	    <row>
-	      <entry><option>-fdisambiguate-record-fields</option></entry>
+	      <entry><option>-XDisambiguateRecordFields</option></entry>
 	      <entry>Enable <link linkend="disambiguate-fields">record 
 	      field disambiguation</link></entry>
 	      <entry>dynamic</entry>
-	      <entry><option>-fno-disambiguate-record-fields</option></entry>
+	      <entry><option>-XNoDisambiguateRecordFields</option></entry>
 	    </row>
 	    <row>
 	      <entry><option>-XForeignFunctionInterface</option></entry>

docs/users_guide/glasgow_exts.xml

@@ -1232,7 +1232,7 @@ it is not clear which of the two types is intended.
 </para>
 <para>
 Haskell 98 regards all four as ambiguous, but with the
-<option>-fdisambiguate-record-fields</option> flag, GHC will accept
+<option>-XDisambiguateRecordFields</option> flag, GHC will accept
 the former two.  The rules are precisely the same as those for instance
 declarations in Haskell 98, where the method names on the left-hand side 
 of the method bindings in an instance declaration refer unambiguously