patch 8.2.0301: insufficient testing for exception handling

Problem:    Insufficient testing for exception handling and the "attention"
            prompt.
Solution:   Add test cases. (Yegappan Lakshmanan, closes #5681)
diff --git a/src/version.c b/src/version.c
index 16bf1e1..cda4a81 100644
--- a/src/version.c
+++ b/src/version.c
@@ -739,6 +739,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    301,
+/**/
     300,
 /**/
     299,