formatting improvment

contrib/mariadb-stretch-err1071.md

@@ -17,9 +17,11 @@ There are several possible workarounds for the problem:
 
  * Use `utf8` (not `utf8mb4`). Either by setting `store.db.Charset` to `utf8` or by
    creating the database using this command:
+
    ```mysql
 create database tank CHARACTER SET utf8 COLLATE utf8_general_ci;
    ```
+
    Setting the character set using the daemon configuration is preferred because this also
    sets makes sure that the database connection itself will use the correct settings as well.