patch 8.2.1260: there is no good test for CursorHold

Problem:    There is no good test for CursorHold.
Solution:   Add a test.  Remove duplicated test. (Yegappan Lakshmanan,
            closes #6503

src/version.c

@@ -754,6 +754,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1260,
 /**/
     1259,
 /**/