patch 8.0.0603: gF test fails on MS-Windows

Problem:    gF test fails on MS-Windows.
Solution:   Use @ instead of : before the line number
diff --git a/src/version.c b/src/version.c
index cb35520..6a65035 100644
--- a/src/version.c
+++ b/src/version.c
@@ -765,6 +765,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    603,
+/**/
     602,
 /**/
     601,