don't output anything if any url fails

cmd/root.go

@@ -57,8 +57,12 @@ func rssfetch(cmd *cobra.Command, urls []string) {
 		feedChs = append(feedChs, ch)
 	}
 
+	var feeds []*gofeed.Feed
 	for _, feedCh := range feedChs {
-		feed := <-feedCh
+		feeds = append(feeds, <-feedCh)
+	}
+
+	for _, feed := range feeds {
 		for _, item := range feed.Items {
 			out, err := formatItem(item, tmpl)
 			if err != nil {