patch 8.1.0832: confirm() is not tested

Problem:    confirm() is not tested.
Solution:   Add a test. (Dominique Pelle, closes #3868)
diff --git a/src/version.c b/src/version.c
index 1e5f7e3..fc8fe1b 100644
--- a/src/version.c
+++ b/src/version.c
@@ -784,6 +784,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    832,
+/**/
     831,
 /**/
     830,