patch 8.2.1810: some code in normal.c not covered by tests

Problem:    Some code in normal.c not covered by tests.
Solution:   Add normal mode tests. (Yegappan Lakshmanan, closes #7086)
diff --git a/src/version.c b/src/version.c
index 9c4029f..140b3c8 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1810,
+/**/
     1809,
 /**/
     1808,