feat(general): fix display errors for maintenance stats (#4984)

cli/command_maintenance_info.go

@@ -133,7 +133,7 @@ func getMessageFromRun(extra []maintenancestats.Extra) string {
 	}
 
 	if extraStr.Len() > 0 {
-		succeed = ": " + extraStr.String()
+		succeed += ": " + extraStr.String()
 	}
 
 	return succeed

repo/maintenancestats/stats_advance_epoch.go

@@ -27,6 +27,8 @@ func (as *AdvanceEpochStats) Summary() string {
 	var message string
 	if as.WasAdvanced {
 		message = fmt.Sprintf("Advanced epoch to %v", as.CurrentEpoch)
+	} else {
+		message = fmt.Sprintf("Stayed at epoch %v", as.CurrentEpoch)
 	}
 
 	return message