patch 8.2.0389: delayed redraw when shifting text from Insert mode

Problem:    Delayed redraw when shifting text from Insert mode.
Solution:   Use msg_attr_keep() instead of msg(). (closes #5782)
diff --git a/src/version.c b/src/version.c
index 3724b9b..fede5ea 100644
--- a/src/version.c
+++ b/src/version.c
@@ -739,6 +739,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    389,
+/**/
     388,
 /**/
     387,