Update array_combine return values section (#1513)

Fix #1512

Author: saundefined

reference/array/functions/array-combine.xml

@@ -51,8 +51,7 @@
  <refsect1 role="returnvalues">
   &reftitle.returnvalues;
   <para>
-   Returns the combined <type>array</type>, &false; if the number of elements
-   for each array isn't equal.
+   Returns the combined <type>array</type>.
   </para>
  </refsect1>
 
@@ -82,7 +81,8 @@
       <entry>
        <function>array_combine</function> will now throw a
        <classname>ValueError</classname> if the number of elements
-       for each array is not equal.
+       for each array is not equal;
+       previously this function returned &false; instead.
       </entry>
      </row>
     </tbody>