patch 8.2.1120: Python code not tested properly

Problem:    Python code not tested properly.
Solution:   Add more tests and convert old-style test into new-style test.
            (Yegappan Lakshmanan, closes #6370)

src/version.c

@@ -754,6 +754,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1120,
 /**/
     1119,
 /**/