patch 8.2.2889: typo and verbose comment in Makefiles

Problem:    Typo and verbose comment in Makefiles.
Solution:   Fix typo. Use @#. (Ken Takata, closes #8252)
diff --git a/src/version.c b/src/version.c
index 7902d3b..56f0f0b 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2889,
+/**/
     2888,
 /**/
     2887,