patch 8.2.3835: the inline-function example does not work

Problem:    The inline-function example does not work.
Solution:   Drop ":let".  Add EX_EXPR_ARG to CMD_var. (issue #9352)
diff --git a/src/version.c b/src/version.c
index 368384c..7b2c484 100644
--- a/src/version.c
+++ b/src/version.c
@@ -750,6 +750,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    3835,
+/**/
     3834,
 /**/
     3833,