Correct the key used in changeRule(), ensure no double new rule.

However, I'm still wondering what's the goal in it, overwriting the rule's
parse and render methods should be the right way ...


git-svn-id: https://svn.php.net/repository/pear/packages/Text_Wiki/trunk@207184 c90b9560-bf6c-de11-be94-00142212c4b1

Text/Wiki.php

@@ -741,7 +741,9 @@ function changeRule($old, $new)
         $new = ucwords(strtolower($new));
         $key = array_search($old, $this->rules);
         if ($key !== false) {
-            $this->rules[$old] = $new;
+            // delete the new name , case it was already there
+            $this->deleteRule($new);
+            $this->rules[$key] = $new;
         }
     }