patch 9.0.0616: spell test fails because error message changed

Problem:    Spell test fails because error message changed.
Solution:   Adjust expected error message.
diff --git a/src/version.c b/src/version.c
index 5bf2999..815f27b 100644
--- a/src/version.c
+++ b/src/version.c
@@ -700,6 +700,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    616,
+/**/
     615,
 /**/
     614,