Use readable MSSQL quote escaping

Author: lovasoa

tests/data_formats/csv_data_mssql.sql

@@ -8,4 +8,4 @@ select
 union all
 select
     1 as id,
-    CONCAT(N'Tu gères ', NCHAR(39), NCHAR(59), NCHAR(39), N' et ', NCHAR(39), NCHAR(34), NCHAR(39), N' ?') as msg;
+    N'Tu gères '';'' et ''"'' ?' as msg;