Fix formatting of message and add test

Issue: https://progress.opensuse.org/issues/119176

backlogger.py

@@ -111,7 +111,7 @@ def _update_issue_priority(poo_id, priority_current, poo_reminder_state, msg):
                          slo_priorities[priority_current]["next_priority"]["name"],
                          poo_id))
         url = "{}/{}.json".format(data["web"], poo_id)
-        msg = " ".join([reminder_text, update_slo_text.format(
+        msg = " ".join([reminder_text.format(priority=priority_current, url=data["url"]), update_slo_text.format(
             priority=slo_priorities[priority_current]["next_priority"]["name"])])
         json_rest("PUT", url,
                   {"issue":

tests/test_comments.py

@@ -122,6 +122,23 @@ def test_automatic_priority_on_issue(self):
                 out, err = self.capsys.readouterr()
                 assert re.search(expected_str.format(params[0],
                                                      params[1]), out)
+        calls = [
+            call(
+                "GET",
+                "https://example.com/wiki/1000.json?include=journals",
+            ),
+            call(
+                "PUT",
+                "https://example.com/wiki/1000.json",
+                {
+                    "issue": {
+                        "priority_id": 3,
+                        "notes": "This ticket was set to **Normal** priority but was not updated [within the SLO period](https://example.com/issues). Please consider picking up this ticket or just set the ticket to the next lower priority. The ticket will be set to the next lower priority **Low**."
+                    }
+                },
+            ),
+        ]
+        backlogger.json_rest.assert_has_calls(calls)
 
 
     def test_issue_with_low_priority_never_change(self):