patch 8.1.1326: no test for listener with partial

Problem:    No test for listener with partial.
Solution:   Add a test.  Add example to help.
diff --git a/src/version.c b/src/version.c
index 24f4bea..a957025 100644
--- a/src/version.c
+++ b/src/version.c
@@ -768,6 +768,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1326,
+/**/
     1325,
 /**/
     1324,