patch 8.0.0389: test for arabic does not check what is displayed

Problem:    Test for arabic does not check what is displayed.
Solution:   Improve what is asserted. (Dominique Pelle, closes #1523)
            Add a first shaping test.
diff --git a/src/version.c b/src/version.c
index 19d3322..cff9e26 100644
--- a/src/version.c
+++ b/src/version.c
@@ -765,6 +765,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    389,
+/**/
     388,
 /**/
     387,