버그 수정...

src/sammo/JosaUtil.php

@@ -610,6 +610,9 @@ class JosaUtil{
         $search = [];
         $replace = [];
 
+        $prefix = ':';
+        $postfix = ':';
+
         foreach(static::DEFAULT_POSTPOSITION as $wJong => $woJong){
             $value = JosaUtil::pick($key, $wJong);
             $search[] = "{$prefix}{$wJong}{$postfix}";

src/sammo/Util.php

@@ -571,7 +571,7 @@ class Util extends \utilphp\util
      *
      * @param array $items 선택하고자 하는 배열
      *
-     * @return object 선택된 value값.
+     * @return int|float|string|object 선택된 value값.
      */
     public static function choiceRandom(array $items)
     {