m/c/metroctl: add newline between unapproved nodes

Change-Id: I1db00eb9396e597a4596ad2b491a75bbcebacd62
Reviewed-on: https://review.monogon.dev/c/monogon/+/1812
Reviewed-by: Tim Windelschmidt <tim@monogon.tech>
Tested-by: Jenkins CI
diff --git a/metropolis/cli/metroctl/cmd_node_approve.go b/metropolis/cli/metroctl/cmd_node_approve.go
index 9d685a1..b26ea2f 100644
--- a/metropolis/cli/metroctl/cmd_node_approve.go
+++ b/metropolis/cli/metroctl/cmd_node_approve.go
@@ -51,7 +51,7 @@
 		// If no id was given, just list the nodes pending approval.
 		if len(nodes) != 0 {
 			for _, n := range nodes {
-				fmt.Print(identity.NodeID(n.Pubkey))
+				fmt.Println(identity.NodeID(n.Pubkey))
 			}
 		} else {
 			log.Print("There are no nodes pending approval at this time.")