Fix SQL queries related to fulltext search engine - refs CT#8013

Author: ywarnier

main/exercice/question.class.php

@@ -965,7 +965,7 @@ public function search_engine_edit($exerciseId, $addQs=false, $rmQs=false)
             $tbl_se_ref = Database::get_main_table(TABLE_MAIN_SEARCH_ENGINE_REF);
             if ($addQs || $rmQs) {
                 //there's only one row per question on normal db and one document per question on search engine db
-                $sql = 'SELECT * FROM %
+                $sql = 'SELECT * FROM %s
                     WHERE course_code=\'%s\' AND tool_id=\'%s\' AND ref_id_second_level=%s LIMIT 1';
                 $sql = sprintf($sql, $tbl_se_ref, $course_id, TOOL_QUIZ, $this->id);
             } else {