typo/wording

Author: msamesch

appendices/migration71/incompatible.xml

@@ -143,10 +143,10 @@ Warning: Cannot call func_num_args() dynamically in %s on line %d
   <para>
    <function>mt_rand</function> will now default to using the fixed version of
    the Mersenne Twister algorithm. If deterministic output from
-   <function>mt_srand</function> was relied upon, then the
-   <constant>MT_RAND_PHP</constant> with the ability to preserve the old
-   (incorrect) implementation via an additional optional second parameter to
-   <function>mt_srand</function>.
+   <function>mt_rand</function> was relied upon, then
+   <constant>MT_RAND_PHP</constant> can be used as optional second parameter
+   to <function>mt_srand</function> to preserve the old (incorrect)
+   implementation.
   </para>
  </sect2>