显示的时候也会重新转会html字符

web/template/syzoj/problem.php

@@ -128,6 +128,7 @@ if ($pr_flag) {
         strpos($s, "class=\"md") === false
       )  // 没找到，那就加上
         $s = "<span class='md'>" . $s . "</span>";
+      $s = html_entity_decode($str, ENT_QUOTES, 'UTF-8');
       return $s;
     }
     ?>