updated for version 7.3.1304
Problem:    Test 89 still fails on MS-Windows.
Solution:   Set 'shellslash'. (Taro Muraoka)
diff --git a/src/version.c b/src/version.c
index 7b6b20d..494df12 100644
--- a/src/version.c
+++ b/src/version.c
@@ -729,6 +729,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1304,
+/**/
     1303,
 /**/
     1302,