tests/stats: show how last item sent may be wrong

Extend the test to illustrate the bug described in the related issue,
which will be fixed with the next patch.

Related: OS#5215
Change-Id: I1d26867ac1b837bea6a9754a3203e53c147e7a5f
diff --git a/tests/stats/stats_test.err b/tests/stats/stats_test.err
index 69104d9..08c2cbc 100644
--- a/tests/stats/stats_test.err
+++ b/tests/stats/stats_test.err
@@ -115,6 +115,8 @@
 report (group 1, item 1 update twice, check max):
   test2: item p= g=test.one i=1 n=item.a v=20 u=ma
   test1: item p= g=test.one i=1 n=item.a v=20 u=ma
+report (group 1, item 1 no update, send last item (!= last max), OS#5215):
+report (group 1, item 1 no update, nothing to send):
 report (remove statg1, ctrg1):
   test2: counter p= g=ctr-test:one_dot i=3 n=ctr:a v=0 d=0
   test1: counter p= g=ctr-test:one_dot i=3 n=ctr:a v=0 d=0